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1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="19"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Bindings (env)</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/bindings/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers-ai/get-started/workers-wrangler/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#2-connect-your-worker-to-workers-ai" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">AI ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/analytics/analytics-engine?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Analytics Engine ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/static-assets/binding/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Assets ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/browser-rendering?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Browser Rendering ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/d1/build-with-d1/d1-client-api/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">D1 ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/cloudflare-for-platforms/workers-for-platforms/get-started/configuration/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Dispatcher (Workers for Platforms) ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/durable-objects/api/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Durable Objects ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/configuration/environment-variables/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Environment Variables ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/hyperdrive?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Hyperdrive ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/kv/api/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">KV ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/bindings/mtls/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">mTLS</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/queues/configuration/javascript-apis/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Queues ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/r2/api/workers/workers-api-reference/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">R2 ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/bindings/rate-limit/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Rate Limiting</span> <span class="sl-badge default small astro-3ii7xxms astro-avdet4wd">Beta</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/configuration/secrets/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Secrets ↗</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="37"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Service bindings</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/bindings/service-bindings/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/bindings/service-bindings/http/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">HTTP</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/bindings/service-bindings/rpc/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">RPC (WorkerEntrypoint)</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/observability/logs/tail-workers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Tail Workers ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/vectorize/reference/client-api/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Vectorize ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/bindings/version-metadata/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Version metadata</span> <span class="sl-badge default small astro-3ii7xxms astro-avdet4wd">Beta</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workflows/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Workflows ↗</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/cache/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Cache</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/console/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Console</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/context/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Context (ctx)</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/encoding/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Encoding</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/eventsource/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">EventSource</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/fetch/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Fetch</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="20"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Handlers</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/handlers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/durable-objects/api/alarms/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Alarm Handler ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/email-routing/email-workers/runtime-api/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Email Handler ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/handlers/fetch/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Fetch Handler</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/queues/configuration/javascript-apis/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#consumer" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Queue Handler ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/handlers/scheduled/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Scheduled Handler</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/handlers/tail/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Tail Handler</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/headers/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Headers</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/html-rewriter/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">HTMLRewriter</span> </a></li> <li class="astro-3ii7xxms"> <details open class="astro-3ii7xxms"><sl-sidebar-restore data-index="21"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Node.js compatibility</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/assert/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">assert</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" aria-current="page" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">AsyncLocalStorage</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/buffer/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Buffer</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/crypto/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Crypto</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/diagnostics-channel/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Diagnostics Channel</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/eventemitter/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">EventEmitter</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/path/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">path</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/process/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">process</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/streams/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Streams</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/string-decoder/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">StringDecoder</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/test/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">test</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/url/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">url</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/util/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">util</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/zlib/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">zlib</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/performance/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Performance and timers</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="22"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Remote-procedure call (RPC)</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/rpc/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/rpc/lifecycle/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Lifecycle</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/rpc/reserved-methods/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Reserved Methods</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/rpc/visibility/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Visibility and Security Model</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/rpc/typescript/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">TypeScript</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/rpc/error-handling/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Error handling</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/request/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Request</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/response/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Response</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="23"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Streams</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/streams/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/streams/readablestream/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">ReadableStream</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/streams/readablestreambyobreader/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">ReadableStream BYOBReader</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/streams/readablestreamdefaultreader/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">ReadableStream DefaultReader</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/streams/transformstream/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">TransformStream</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/streams/writablestream/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">WritableStream</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/streams/writablestreamdefaultwriter/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">WritableStream DefaultWriter</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/tcp-sockets/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">TCP sockets</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/web-crypto/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Web Crypto</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/web-standards/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Web standards</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="24"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">WebAssembly (Wasm)</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/webassembly/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/webassembly/javascript/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Wasm in JavaScript</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/websockets/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">WebSockets</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="4"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Static Assets</span> <span class="sl-badge default small astro-3ii7xxms astro-avdet4wd">Beta</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/static-assets/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/static-assets/get-started/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Get Started</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/static-assets/binding/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Configuration and binding</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/static-assets/routing/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Routing</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/static-assets/compatibility-matrix/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Workers vs. Pages (compatibility matrix)</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/static-assets/direct-upload/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Direct Uploads</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="5"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Frameworks</span> <span class="sl-badge default small astro-3ii7xxms astro-avdet4wd">Beta</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="25"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Framework guides</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/angular/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Angular</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/astro/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Astro</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/docusaurus/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Docusaurus</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/gatsby/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Gatsby</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/nextjs/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Next.js</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/nuxt/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Nuxt</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/qwik/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Qwik</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/remix/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Remix</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/solid/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Solid</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/frameworks/framework-guides/svelte/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Svelte</span> </a></li> </ul> </details></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="6"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Databases</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/databases/connecting-to-databases/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Connect to databases</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/analytics/analytics-engine/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Analytics Engine ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/vectorize/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Vectorize (vector database) ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/d1/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Cloudflare D1 ↗</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/hyperdrive/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Hyperdrive ↗</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="26"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Database Integrations</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/databases/native-integrations/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> <span class="sl-badge default small astro-3ii7xxms astro-avdet4wd">Beta</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/databases/native-integrations/fauna/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Fauna</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/databases/native-integrations/neon/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Neon</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/databases/native-integrations/planetscale/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">PlanetScale</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/databases/native-integrations/supabase/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Supabase</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/databases/native-integrations/turso/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Turso</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/databases/native-integrations/upstash/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Upstash</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/databases/native-integrations/xata/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Xata</span> </a></li> </ul> </details></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="7"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Testing</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/testing/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/testing/local-development/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Local development</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/testing/unit-testing/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Unit testing</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/testing/integration-testing/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" 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<li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/observability/integrations/sentry/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Sentry</span> <span class="sl-badge default small astro-3ii7xxms astro-avdet4wd">Beta</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/observability/metrics-and-analytics/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Metrics and analytics</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/observability/source-maps/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Source maps and stack traces</span> <span class="sl-badge default small astro-3ii7xxms astro-avdet4wd">Beta</span> </a></li> </ul> </details></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="9"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Wrangler</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Overview</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/install-and-update/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Install/Update Wrangler</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/api/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">API</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/bundling/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Bundling</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/commands/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Commands</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/configuration/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Configuration</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/custom-builds/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Custom builds</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/deprecations/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Deprecations</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/environments/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">Environments</span> </a></li> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="31"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Migrations</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"> <details class="astro-3ii7xxms"><sl-sidebar-restore data-index="39"></sl-sidebar-restore> <summary class="astro-3ii7xxms"> <div class="group-label astro-3ii7xxms"><span class="large astro-3ii7xxms">Migrate from Wrangler v1 to v2</span> </div> <svg aria-hidden="true" class="caret astro-3ii7xxms astro-c6vsoqas" width="16" height="16" viewbox="0 0 24 24" fill="currentColor" style="--sl-icon-size: 1.25rem;"> <path d="m14.83 11.29-4.24-4.24a1 1 0 1 0-1.42 1.41L12.71 12l-3.54 3.54a1 1 0 0 0 0 1.41 1 1 0 0 0 .71.29 1 1 0 0 0 .71-.29l4.24-4.24a1.002 1.002 0 0 0 0-1.42Z" /> </svg></summary> <ul class="astro-3ii7xxms"> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/migration/v1-to-v2/eject-webpack/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">1. Migrate webpack projects</span> </a></li> <li class="astro-3ii7xxms"><a href="https://developers-cloudflare-com.translate.goog/workers/wrangler/migration/v1-to-v2/update-v1-to-v2/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB" class="astro-3ii7xxms"> <span class="astro-3ii7xxms">2. 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fill="currentColor" class="starlight-aside__icon"> <path d="M12 16C11.8022 16 11.6089 16.0587 11.4444 16.1686C11.28 16.2784 11.1518 16.4346 11.0761 16.6173C11.0004 16.8001 10.9806 17.0011 11.0192 17.1951C11.0578 17.3891 11.153 17.5673 11.2929 17.7071C11.4327 17.847 11.6109 17.9422 11.8049 17.9808C11.9989 18.0194 12.2 17.9996 12.3827 17.9239C12.5654 17.8482 12.7216 17.72 12.8315 17.5556C12.9413 17.3911 13 17.1978 13 17C13 16.7348 12.8946 16.4805 12.7071 16.2929C12.5196 16.1054 12.2652 16 12 16ZM22.67 17.47L14.62 3.47003C14.3598 3.00354 13.9798 2.61498 13.5192 2.3445C13.0586 2.07401 12.5341 1.9314 12 1.9314C11.4659 1.9314 10.9414 2.07401 10.4808 2.3445C10.0202 2.61498 9.64019 3.00354 9.38 3.47003L1.38 17.47C1.11079 17.924 0.966141 18.441 0.960643 18.9688C0.955144 19.4966 1.089 20.0166 1.34868 20.4761C1.60837 20.9356 1.9847 21.3185 2.43968 21.5861C2.89466 21.8536 3.41218 21.9964 3.94 22H20.06C20.5921 22.0053 21.1159 21.8689 21.5779 21.6049C22.0399 21.341 22.4234 20.9589 22.689 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8.29292C12.5196 8.10538 12.2652 8.00003 12 8.00003Z" /> </svg>Warning</p> <div class="starlight-aside__content"> <p>To use Node.js APIs in your Worker, add the <a href="https://developers-cloudflare-com.translate.goog/workers/configuration/compatibility-flags/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#nodejs-compatibility-flag"><code dir="auto">nodejs_compat_v2</code> compatibility flag</a> to your <code dir="auto">wrangler.toml</code> file.</p> </div> </aside> <p>Cloudflare Workers provides an implementation of a subset of the Node.js <a href="https://translate.google.com/website?sl=pl&tl=en&hl=en-GB&u=https://nodejs.org/dist/latest-v18.x/docs/api/async_context.html%23class-asynclocalstorage" target="_blank" rel="noopener"><code dir="auto">AsyncLocalStorage</code><span> ↗</span></a> API for creating in-memory stores that remain coherent through asynchronous operations.</p> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="constructor">Constructor</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#constructor"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <div class="expressive-code"> <link rel="stylesheet" href="/_astro/ec.jmw5e.css"> <script type="module" src="/_astro/ec.8zarh.js"></script> <figure class="frame not-content"> <figcaption class="header"></figcaption> <pre data-language="js"><code> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">import </span><span style="--0:#89DDFF;--1:#007474">{</span><span style="--1:#8F1500"><span style="--0:#EE9080"> </span><span style="--0:#D5D7D8">AsyncLocalStorage</span><span style="--0:#EE9080"> </span></span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EE9080;--1:#8F1500"> from </span><span style="--0:#FDDA68;--1:#A84E00">'node:async_hooks'</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">asyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">AsyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div></code></pre> <div class="copy"> <button title="Copy to clipboard" data-copied="Copied!" data-code="import { AsyncLocalStorage } from 'node:async_hooks';const asyncLocalStorage = new AsyncLocalStorage();"> <div></div></button> </div> </figure> </div> <ul> <li><p><code>new AsyncLocalStorage()</code> : AsyncLocalStorage</p> <ul> <li>Returns a new <code dir="auto">AsyncLocalStorage</code> instance.</li> </ul></li> </ul> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="methods">Methods</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#methods"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <ul> <li><p><code dir="auto">getStore()</code> : any</p> <ul> <li>Returns the current store. If called outside of an asynchronous context initialized by calling <code dir="auto">asyncLocalStorage.run()</code>, it returns <code dir="auto">undefined</code>.</li> </ul></li> <li><p><code>run(storeany, callbackfunction, ...argsarguments)</code> : any</p> <ul> <li>Runs a function synchronously within a context and returns its return value. The store is not accessible outside of the callback function. The store is accessible to any asynchronous operations created within the callback. The optional <code dir="auto">args</code> are passed to the callback function. If the callback function throws an error, the error is thrown by <code dir="auto">run()</code> also.</li> </ul></li> <li><p><code>exit(callbackfunction, ...argsarguments)</code> : any</p> <ul> <li>Runs a function synchronously outside of a context and returns its return value. This method is equivalent to calling <code dir="auto">run()</code> with the <code dir="auto">store</code> value set to <code dir="auto">undefined</code>.</li> </ul></li> </ul> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="static-methods">Static Methods</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#static-methods"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <ul> <li><p><code dir="auto">AsyncLocalStorage.bind(fn)</code> : function</p> <ul> <li>Captures the asynchronous context that is current when <code dir="auto">bind()</code> is called and returns a function that enters that context before calling the passed in function.</li> </ul></li> <li><p><code dir="auto">AsyncLocalStorage.snapshot()</code> : function</p> <ul> <li>Captures the asynchronous context that is current when <code dir="auto">snapshot()</code> is called and returns a function that enters that context before calling a given function.</li> </ul></li> </ul> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="examples">Examples</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#examples"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <div tabindex="-1" class="heading-wrapper level-h3"> <h3 id="fetch-listener">Fetch Listener</h3><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#fetch-listener"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <div class="expressive-code"> <figure class="frame not-content"> <figcaption class="header"></figcaption> <pre data-language="js"><code> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">import </span><span style="--0:#89DDFF;--1:#007474">{</span><span style="--1:#8F1500"><span style="--0:#EE9080"> </span><span style="--0:#D5D7D8">AsyncLocalStorage</span><span style="--0:#EE9080"> </span></span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EE9080;--1:#8F1500"> from </span><span style="--0:#FDDA68;--1:#A84E00">'node:async_hooks'</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">asyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">AsyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">let</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#D5D7D8;--1:#8F1500">idSeq</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#B59EE1;--1:#7C008F">0</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">export</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">default</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">async</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">fetch</span><span style="--0:#89DDFF;--1:#007474">(</span><span style="--0:#B59EE1;--1:#7C008F">req</span><span style="--0:#89DDFF;--1:#007474">)</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">return</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">asyncLocalStorage</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">run</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--1:#8F1500"><span style="--0:#D5D7D8">idSeq</span><span style="--0:#EE9080">++</span></span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#A9A9A5;--0fs:italic;--1:#62676A;--1fs:italic">// Simulate some async activity...</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">await</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">scheduler</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">wait</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#B59EE1;--1:#7C008F">1000</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">return</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">Response</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#EEFFFF;--1:#00268F">asyncLocalStorage</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">getStore</span><span style="--0:#EEFFFF;--1:#62676A">())</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#89DDFF;--1:#007474">};</span> </div> </div></code></pre> <div class="copy"> <button title="Copy to clipboard" data-copied="Copied!" data-code="import { AsyncLocalStorage } from 'node:async_hooks';const asyncLocalStorage = new AsyncLocalStorage();let idSeq = 0;export default { async fetch(req) { return asyncLocalStorage.run(idSeq++, () => { // Simulate some async activity... await scheduler.wait(1000); return new Response(asyncLocalStorage.getStore()); }); }};"> <div></div></button> </div> </figure> </div> <div tabindex="-1" class="heading-wrapper level-h3"> <h3 id="multiple-stores">Multiple stores</h3><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#multiple-stores"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>The API supports multiple <code dir="auto">AsyncLocalStorage</code> instances to be used concurrently.</p> <div class="expressive-code"> <figure class="frame not-content"> <figcaption class="header"></figcaption> <pre data-language="js"><code> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">import </span><span style="--0:#89DDFF;--1:#007474">{</span><span style="--1:#8F1500"><span style="--0:#EE9080"> </span><span style="--0:#D5D7D8">AsyncLocalStorage</span><span style="--0:#EE9080"> </span></span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EE9080;--1:#8F1500"> from </span><span style="--0:#FDDA68;--1:#A84E00">'node:async_hooks'</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">als1</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">AsyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">als2</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">AsyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">export</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">default</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">async</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">fetch</span><span style="--0:#89DDFF;--1:#007474">(</span><span style="--0:#B59EE1;--1:#7C008F">req</span><span style="--0:#89DDFF;--1:#007474">)</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">return</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">als1</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">run</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#B59EE1;--1:#7C008F">123</span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">return</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">als2</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">run</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#B59EE1;--1:#7C008F">321</span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#A9A9A5;--0fs:italic;--1:#62676A;--1fs:italic">// Simulate some async activity...</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">await</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">scheduler</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">wait</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#B59EE1;--1:#7C008F">1000</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">return</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">Response</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#FDDA68;--1:#A84E00">`</span><span style="--0:#89DDFF;--1:#007474">${</span><span style="--0:#EEFFFF;--1:#00268F">als1</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">getStore</span><span style="--0:#FDDA68;--1:#A84E00">()</span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#FDDA68;--1:#A84E00">-</span><span style="--0:#89DDFF;--1:#007474">${</span><span style="--0:#EEFFFF;--1:#00268F">als2</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">getStore</span><span style="--0:#FDDA68;--1:#A84E00">()</span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#FDDA68;--1:#A84E00">`</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#89DDFF;--1:#007474">};</span> </div> </div></code></pre> <div class="copy"> <button title="Copy to clipboard" data-copied="Copied!" data-code="import { AsyncLocalStorage } from 'node:async_hooks';const als1 = new AsyncLocalStorage();const als2 = new AsyncLocalStorage();export default { async fetch(req) { return als1.run(123, () => { return als2.run(321, () => { // Simulate some async activity... await scheduler.wait(1000); return new Response(`${als1.getStore()}-${als2.getStore()}`); }); }); }};"> <div></div></button> </div> </figure> </div> <div tabindex="-1" class="heading-wrapper level-h3"> <h3 id="unhandled-rejections">Unhandled Rejections</h3><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#unhandled-rejections"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>When a <code dir="auto">Promise</code> rejects and the rejection is unhandled, the async context propagates to the <code dir="auto">'unhandledrejection'</code> event handler:</p> <div class="expressive-code"> <figure class="frame not-content"> <figcaption class="header"></figcaption> <pre data-language="js"><code> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">import </span><span style="--0:#89DDFF;--1:#007474">{</span><span style="--1:#8F1500"><span style="--0:#EE9080"> </span><span style="--0:#D5D7D8">AsyncLocalStorage</span><span style="--0:#EE9080"> </span></span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EE9080;--1:#8F1500"> from </span><span style="--0:#FDDA68;--1:#A84E00">'node:async_hooks'</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">asyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">AsyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">let</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#D5D7D8;--1:#8F1500">idSeq</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#B59EE1;--1:#7C008F">0</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#57C78F;--1:#00783C">addEventListener</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#FDDA68;--1:#A84E00">'unhandledrejection'</span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">(</span><span style="--0:#B59EE1;--1:#7C008F">event</span><span style="--0:#89DDFF;--1:#007474">)</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"><span style="--0:#EEFFFF"> </span></span><span style="--0:#EEFFFF;--1:#00268F">console</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">log</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#EEFFFF;--1:#00268F">asyncLocalStorage</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">getStore</span><span style="--0:#EEFFFF;--1:#62676A">()</span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#FDDA68;--1:#A84E00">'unhandled rejection!'</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">export</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">default</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">async</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">fetch</span><span style="--0:#89DDFF;--1:#007474">(</span><span style="--0:#B59EE1;--1:#7C008F">req</span><span style="--0:#89DDFF;--1:#007474">)</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">return</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">asyncLocalStorage</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">run</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--1:#8F1500"><span style="--0:#D5D7D8">idSeq</span><span style="--0:#EE9080">++</span></span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#A9A9A5;--0fs:italic;--1:#62676A;--1fs:italic">// Cause an unhandled rejection!</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">throw</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">Error</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#FDDA68;--1:#A84E00">'boom'</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#89DDFF;--1:#007474">};</span> </div> </div></code></pre> <div class="copy"> <button title="Copy to clipboard" data-copied="Copied!" data-code="import { AsyncLocalStorage } from 'node:async_hooks';const asyncLocalStorage = new AsyncLocalStorage();let idSeq = 0;addEventListener('unhandledrejection', (event) => { console.log(asyncLocalStorage.getStore(), 'unhandled rejection!');});export default { async fetch(req) { return asyncLocalStorage.run(idSeq++, () => { // Cause an unhandled rejection! throw new Error('boom'); }); }};"> <div></div></button> </div> </figure> </div> <div tabindex="-1" class="heading-wrapper level-h3"> <h3 id="asynclocalstoragebind-and-asynclocalstoragesnapshot"><code dir="auto">AsyncLocalStorage.bind()</code> and <code dir="auto">AsyncLocalStorage.snapshot()</code></h3><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#asynclocalstoragebind-and-asynclocalstoragesnapshot"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <div class="expressive-code"> <figure class="frame not-content"> <figcaption class="header"></figcaption> <pre data-language="js"><code> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">import </span><span style="--0:#89DDFF;--1:#007474">{</span><span style="--1:#8F1500"><span style="--0:#EE9080"> </span><span style="--0:#D5D7D8">AsyncLocalStorage</span><span style="--0:#EE9080"> </span></span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EE9080;--1:#8F1500"> from </span><span style="--0:#FDDA68;--1:#A84E00">'node:async_hooks'</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">AsyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">function</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">foo</span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">console</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">log</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">getStore</span><span style="--0:#EEFFFF;--1:#62676A">())</span><span style="--0:#89DDFF;--1:#007474">;</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">}</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">function</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">bar</span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">console</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">log</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">getStore</span><span style="--0:#EEFFFF;--1:#62676A">())</span><span style="--0:#89DDFF;--1:#007474">;</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">}</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">oneFoo</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">run</span><span style="--0:#EE9080;--1:#32008F">(</span><span style="--0:#B59EE1;--1:#7C008F">123</span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">AsyncLocalStorage</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">bind</span><span style="--0:#EE9080;--1:#32008F">(</span><span style="--0:#D5D7D8;--1:#8F1500">foo</span><span style="--0:#EE9080;--1:#32008F">))</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#57C78F;--1:#00783C">oneFoo</span><span style="--0:#EEFFFF;--1:#62676A">()</span><span style="--0:#89DDFF;--1:#007474">;</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#A9A9A5;--0fs:italic;--1:#62676A;--1fs:italic">// prints 123</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">snapshot</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">run</span><span style="--0:#EE9080;--1:#32008F">(</span><span style="--0:#FDDA68;--1:#A84E00">'abc'</span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">AsyncLocalStorage</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">snapshot</span><span style="--0:#EE9080;--1:#32008F">())</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#57C78F;--1:#00783C">snapshot</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#D5D7D8;--1:#8F1500">foo</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#A9A9A5;--0fs:italic;--1:#62676A;--1fs:italic">// prints 'abc'</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#57C78F;--1:#00783C">snapshot</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#D5D7D8;--1:#8F1500">bar</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#A9A9A5;--0fs:italic;--1:#62676A;--1fs:italic">// prints 'abc'</span> </div> </div></code></pre> <div class="copy"> <button title="Copy to clipboard" data-copied="Copied!" data-code="import { AsyncLocalStorage } from 'node:async_hooks';const als = new AsyncLocalStorage();function foo() { console.log(als.getStore()); }function bar() { console.log(als.getStore()); }const oneFoo = als.run(123, () => AsyncLocalStorage.bind(foo));oneFoo(); // prints 123const snapshot = als.run('abc', () => AsyncLocalStorage.snapshot());snapshot(foo); // prints 'abc'snapshot(bar); // prints 'abc'"> <div></div></button> </div> </figure> </div> <div class="expressive-code"> <figure class="frame not-content"> <figcaption class="header"></figcaption> <pre data-language="js"><code> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">import </span><span style="--0:#89DDFF;--1:#007474">{</span><span style="--1:#8F1500"><span style="--0:#EE9080"> </span><span style="--0:#D5D7D8">AsyncLocalStorage</span><span style="--0:#EE9080"> </span></span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EE9080;--1:#8F1500"> from </span><span style="--0:#FDDA68;--1:#A84E00">'node:async_hooks'</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">AsyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">class</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">MyResource</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"><span style="--0:#EEFFFF;--1:#62676A"> </span></span><span style="--0:#EEFFFF;--1:#62676A">#runInAsyncScope </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">AsyncLocalStorage</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">snapshot</span><span style="--0:#EEFFFF;--1:#62676A">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#57C78F;--1:#00783C">doSomething</span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#FF8398;--0fs:italic;--1:#B73C51;--1fs:italic">this</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">#runInAsyncScope</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">return</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">getStore</span><span style="--0:#EEFFFF;--1:#62676A">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#89DDFF;--1:#007474">};</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">myResource</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">run</span><span style="--0:#EE9080;--1:#32008F">(</span><span style="--0:#B59EE1;--1:#7C008F">123</span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">MyResource</span><span style="--0:#EE9080;--1:#32008F">())</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EEFFFF;--1:#00268F">console</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">log</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#EEFFFF;--1:#00268F">myResource</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">doSomething</span><span style="--0:#EEFFFF;--1:#62676A">())</span><span style="--0:#89DDFF;--1:#007474">;</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#A9A9A5;--0fs:italic;--1:#62676A;--1fs:italic">// prints 123</span> </div> </div></code></pre> <div class="copy"> <button title="Copy to clipboard" data-copied="Copied!" data-code="import { AsyncLocalStorage } from 'node:async_hooks';const als = new AsyncLocalStorage();class MyResource { #runInAsyncScope = AsyncLocalStorage.snapshot(); doSomething() { this.#runInAsyncScope(() => { return als.getStore(); }); }};const myResource = als.run(123, () => new MyResource());console.log(myResource.doSomething()); // prints 123"> <div></div></button> </div> </figure> </div> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="asyncresource"><code dir="auto">AsyncResource</code></h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#asyncresource"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <p>The <a href="https://translate.google.com/website?sl=pl&tl=en&hl=en-GB&u=https://nodejs.org/dist/latest-v18.x/docs/api/async_context.html%23class-asyncresource" target="_blank" rel="noopener"><code dir="auto">AsyncResource</code><span> ↗</span></a> class is a component of Node.js' async context tracking API that allows users to create their own async contexts. Objects that extend from <code dir="auto">AsyncResource</code> are capable of propagating the async context in much the same way as promises.</p> <p>Note that <code dir="auto">AsyncLocalStorage.snapshot()</code> and <code dir="auto">AsyncLocalStorage.bind()</code> provide a better approach. <code dir="auto">AsyncResource</code> is provided solely for backwards compatibility with Node.js.</p> <div tabindex="-1" class="heading-wrapper level-h3"> <h3 id="constructor-1">Constructor</h3><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#constructor-1"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <div class="expressive-code"> <figure class="frame not-content"> <figcaption class="header"></figcaption> <pre data-language="js"><code> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">import </span><span style="--0:#89DDFF;--1:#007474">{</span><span style="--1:#8F1500"><span style="--0:#EE9080"> </span><span style="--0:#D5D7D8">AsyncResource</span></span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--1:#8F1500"><span style="--0:#EE9080"> </span><span style="--0:#D5D7D8">AsyncLocalStorage</span><span style="--0:#EE9080"> </span></span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EE9080;--1:#8F1500"> from </span><span style="--0:#FDDA68;--1:#A84E00">'node:async_hooks'</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">AsyncLocalStorage</span><span style="--0:#EE9080;--1:#32008F">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">class</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#57C78F;--1:#00783C">MyResource</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">extends</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#FDDA68;--1:#A84E00">AsyncResource</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">constructor</span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#A9A9A5;--0fs:italic;--1:#62676A;--1fs:italic">// The type string is required by Node.js but unused in Workers.</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#FF8398;--0fs:italic;--1:#B73C51;--1fs:italic">super</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#FDDA68;--1:#A84E00">'MyResource'</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#57C78F;--1:#00783C">doSomething</span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#FF8398;--0fs:italic;--1:#B73C51;--1fs:italic">this</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">runInAsyncScope</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#89DDFF;--1:#007474">{</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#EE9080;--1:#8F1500">return</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">getStore</span><span style="--0:#EEFFFF;--1:#62676A">()</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span><span style="--0:#EEFFFF;--1:#62676A">)</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span class="indent"> </span><span style="--0:#89DDFF;--1:#007474">}</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#89DDFF;--1:#007474">};</span> </div> </div> <div class="ec-line"> <div class="code"> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EE9080;--1:#8F1500">const</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">myResource</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EEFFFF;--1:#00268F">als</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">run</span><span style="--0:#EE9080;--1:#32008F">(</span><span style="--0:#B59EE1;--1:#7C008F">123</span><span style="--0:#89DDFF;--1:#007474">,</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#89DDFF;--1:#007474">()</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">=></span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#EE9080;--1:#8F1500">new</span><span style="--0:#EE9080;--1:#32008F"> </span><span style="--0:#57C78F;--1:#00783C">MyResource</span><span style="--0:#EE9080;--1:#32008F">())</span><span style="--0:#89DDFF;--1:#007474">;</span> </div> </div> <div class="ec-line"> <div class="code"> <span style="--0:#EEFFFF;--1:#00268F">console</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">log</span><span style="--0:#EEFFFF;--1:#62676A">(</span><span style="--0:#EEFFFF;--1:#00268F">myResource</span><span style="--0:#89DDFF;--1:#007474">.</span><span style="--0:#57C78F;--1:#00783C">doSomething</span><span style="--0:#EEFFFF;--1:#62676A">())</span><span style="--0:#89DDFF;--1:#007474">;</span><span style="--0:#EEFFFF;--1:#62676A"> </span><span style="--0:#A9A9A5;--0fs:italic;--1:#62676A;--1fs:italic">// prints 123</span> </div> </div></code></pre> <div class="copy"> <button title="Copy to clipboard" data-copied="Copied!" data-code="import { AsyncResource, AsyncLocalStorage } from 'node:async_hooks';const als = new AsyncLocalStorage();class MyResource extends AsyncResource { constructor() { // The type string is required by Node.js but unused in Workers. super('MyResource'); } doSomething() { this.runInAsyncScope(() => { return als.getStore(); }); }};const myResource = als.run(123, () => new MyResource());console.log(myResource.doSomething()); // prints 123"> <div></div></button> </div> </figure> </div> <ul> <li><p><code>new AsyncResource(typestring, optionsAsyncResourceOptions)</code> : AsyncResource</p> <ul> <li>Returns a new <code dir="auto">AsyncResource</code>. Importantly, while the constructor arguments are required in Node.js' implementation of <code dir="auto">AsyncResource</code>, they are not used in Workers.</li> </ul></li> <li><code>AsyncResource.bind(fnfunction, typestring, thisArgany)</code> <ul> <li>Binds the given function to the current async context.</li> </ul></li> </ul> <div tabindex="-1" class="heading-wrapper level-h3"> <h3 id="methods-1">Methods</h3><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#methods-1"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <ul> <li><code>asyncResource.bind(fnfunction, thisArgany)</code> <ul> <li>Binds the given function to the async context associated with this <code dir="auto">AsyncResource</code>.</li> </ul></li> <li><code>asyncResource.runInAsyncScope(fnfunction, thisArgany, ...argsarguments)</code> <ul> <li>Call the provided function with the given arguments in the async context associated with this <code dir="auto">AsyncResource</code>.</li> </ul></li> </ul> <div tabindex="-1" class="heading-wrapper level-h2"> <h2 id="caveats">Caveats</h2><a class="anchor-link" href="https://developers-cloudflare-com.translate.goog/workers/runtime-apis/nodejs/asynclocalstorage/?_x_tr_sl=pl&_x_tr_tl=en&_x_tr_hl=en-GB#caveats"><span aria-hidden="true" class="anchor-icon"> <svg width="16" height="16" viewbox="0 0 24 24"> <path fill="currentcolor" d="m12.11 15.39-3.88 3.88a2.52 2.52 0 0 1-3.5 0 2.47 2.47 0 0 1 0-3.5l3.88-3.88a1 1 0 0 0-1.42-1.42l-3.88 3.89a4.48 4.48 0 0 0 6.33 6.33l3.89-3.88a1 1 0 1 0-1.42-1.42Zm8.58-12.08a4.49 4.49 0 0 0-6.33 0l-3.89 3.88a1 1 0 0 0 1.42 1.42l3.88-3.88a2.52 2.52 0 0 1 3.5 0 2.47 2.47 0 0 1 0 3.5l-3.88 3.88a1 1 0 1 0 1.42 1.42l3.88-3.89a4.49 4.49 0 0 0 0-6.33ZM8.83 15.17a1 1 0 0 0 1.1.22 1 1 0 0 0 .32-.22l4.92-4.92a1 1 0 0 0-1.42-1.42l-4.92 4.92a1 1 0 0 0 0 1.42Z" /> </svg></span></a> </div> <ul> <li><p>The <code dir="auto">AsyncLocalStorage</code> implementation provided by Workers intentionally omits support for the <a href="https://translate.google.com/website?sl=pl&tl=en&hl=en-GB&u=https://nodejs.org/dist/latest-v18.x/docs/api/async_context.html%23asynclocalstorageenterwithstore" target="_blank" rel="noopener"><code dir="auto">asyncLocalStorage.enterWith()</code><span> ↗</span></a> and <a href="https://translate.google.com/website?sl=pl&tl=en&hl=en-GB&u=https://nodejs.org/dist/latest-v18.x/docs/api/async_context.html%23asynclocalstoragedisable" target="_blank" rel="noopener"><code dir="auto">asyncLocalStorage.disable()</code><span> ↗</span></a> methods.</p></li> <li><p>Workers does not implement the full <a href="https://translate.google.com/website?sl=pl&tl=en&hl=en-GB&u=https://nodejs.org/dist/latest-v18.x/docs/api/async_hooks.html" target="_blank" rel="noopener"><code dir="auto">async_hooks</code><span> ↗</span></a> API upon which Node.js' implementation of <code dir="auto">AsyncLocalStorage</code> is built.</p></li> <li><p>Workers does not implement the ability to create an <code dir="auto">AsyncResource</code> with an explicitly identified trigger context as allowed by Node.js. This means that a new <code dir="auto">AsyncResource</code> will always be bound to the async context in which it was created.</p></li> <li><p>Thenables (non-Promise objects that expose a <code dir="auto">then()</code> method) are not fully supported when using <code dir="auto">AsyncLocalStorage</code>. When working with thenables, instead use <a href="https://translate.google.com/website?sl=pl&tl=en&hl=en-GB&u=https://nodejs.org/api/async_context.html%23static-method-asynclocalstoragesnapshot" target="_blank" rel="noopener"><code dir="auto">AsyncLocalStorage.snapshot()</code><span> ↗</span></a> to capture a snapshot of the current context.</p></li> </ul> <div class="feedback-prompt-content astro-cedpceuv"><feedback-prompt class="not-content astro-x6kpz2mu"> <div id="feedback-thumbs" class="astro-x6kpz2mu"> <h2 class="astro-x6kpz2mu">Was this helpful?</h2> <div class="not-content astro-x6kpz2mu"> <svg width="1em" height="1em" class="astro-x6kpz2mu" data-icon="material-symbols:thumb-up-outline-rounded"> <title>Yes</title><symbol id="ai:material-symbols:thumb-up-outline-rounded" viewbox="0 0 24 24"> <path fill="currentColor" d="M21 8q.8 0 1.4.6T23 10v2q0 .175-.05.375t-.1.375l-3 7.05q-.225.5-.75.85T18 21H7V8l6-5.95q.375-.375.888-.437t.987.187t.7.7t.1.925L14.55 8zM9 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