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<!doctype html><html lang="en"><head><title data-rh="true">What’s new in Flutter 3.3. 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aria-describedby="postFooterSocialMenu" aria-labelledby="postFooterSocialMenu"><div><div class="bm" aria-hidden="false"><button aria-controls="postFooterSocialMenu" aria-expanded="false" aria-label="Share Post" data-testid="headerSocialShareButton" class="af fk ah ai aj ak al mf an ao ap ex mg mh lv mi mj mk ml mm s mn mo mp mq mr ms mt u mu mv mw"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" viewBox="0 0 24 24"><path fill="currentColor" fill-rule="evenodd" d="M15.218 4.931a.4.4 0 0 1-.118.132l.012.006a.45.45 0 0 1-.292.074.5.5 0 0 1-.3-.13l-2.02-2.02v7.07c0 .28-.23.5-.5.5s-.5-.22-.5-.5v-7.04l-2 2a.45.45 0 0 1-.57.04h-.02a.4.4 0 0 1-.16-.3.4.4 0 0 1 .1-.32l2.8-2.8a.5.5 0 0 1 .7 0l2.8 2.79a.42.42 0 0 1 .068.498m-.106.138.008.004v-.01zM16 7.063h1.5a2 2 0 0 1 2 2v10a2 2 0 0 1-2 2h-11c-1.1 0-2-.9-2-2v-10a2 2 0 0 1 2-2H8a.5.5 0 0 1 .35.15.5.5 0 0 1 .15.35.5.5 0 0 1-.15.35.5.5 0 0 1-.35.15H6.4c-.5 0-.9.4-.9.9v10.2a.9.9 0 0 0 .9.9h11.2c.5 0 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Only three months ago we announced Flutter 3, a massive milestone that included stable support for all platforms! The good news is that the momentum since this major release has not slowed down. Since the release of Flutter 3, Flutter has merged 5,687 pull requests.</p><p id="18b9" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">This release brings updates to Flutter web, desktop, text handling improvements in performance — and much more!</p><p id="487b" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">We are also introducing exciting updates to the <code class="cx nw nx ny nz b">go_router</code> package, DevTools, and VS Code extensions. Keep reading to learn more.</p><h1 id="3572" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">Framework</h1><h2 id="86d8" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Global Selection</h2><p id="425a" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">Until now, Flutter web apps didn’t match the expected behavior when attempting to select text. Like Flutter apps, native web applications are composed of a tree of elements. In a traditional web app, you can select multiple web elements with a single sweeping gesture, something that couldn’t be easily done on a Flutter web app.</p><p id="06c7" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">Today that all changes! With the introduction of the <code class="cx nw nx ny nz b">SelectableArea</code> widget, any child of the <code class="cx nw nx ny nz b">SelectableArea</code> widget has selection enabled for free!</p><figure class="pv pw px py pz qa ps pt paragraph-image"><div role="button" tabindex="0" class="qb qc fj qd bh qe"><div class="ps pt pu"><picture><source srcSet="https://miro.medium.com/v2/resize:fit:640/format:webp/0*4Mac8uQL3ynXVIuD 640w, https://miro.medium.com/v2/resize:fit:720/format:webp/0*4Mac8uQL3ynXVIuD 720w, https://miro.medium.com/v2/resize:fit:750/format:webp/0*4Mac8uQL3ynXVIuD 750w, https://miro.medium.com/v2/resize:fit:786/format:webp/0*4Mac8uQL3ynXVIuD 786w, https://miro.medium.com/v2/resize:fit:828/format:webp/0*4Mac8uQL3ynXVIuD 828w, https://miro.medium.com/v2/resize:fit:1100/format:webp/0*4Mac8uQL3ynXVIuD 1100w, https://miro.medium.com/v2/resize:fit:1400/format:webp/0*4Mac8uQL3ynXVIuD 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px" type="image/webp"/><source data-testid="og" srcSet="https://miro.medium.com/v2/resize:fit:640/0*4Mac8uQL3ynXVIuD 640w, https://miro.medium.com/v2/resize:fit:720/0*4Mac8uQL3ynXVIuD 720w, https://miro.medium.com/v2/resize:fit:750/0*4Mac8uQL3ynXVIuD 750w, https://miro.medium.com/v2/resize:fit:786/0*4Mac8uQL3ynXVIuD 786w, https://miro.medium.com/v2/resize:fit:828/0*4Mac8uQL3ynXVIuD 828w, https://miro.medium.com/v2/resize:fit:1100/0*4Mac8uQL3ynXVIuD 1100w, https://miro.medium.com/v2/resize:fit:1400/0*4Mac8uQL3ynXVIuD 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px"/><img alt="" class="bh me qf c" width="700" height="335" loading="lazy" role="presentation"/></picture></div></div></figure><p id="65fb" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">To take advantage of this powerful new feature, simply wrap your route body (such as the <code class="cx nw nx ny nz b">Scaffold</code>) with the <code class="cx nw nx ny nz b">SelectionArea</code> widget and let Flutter do the rest.</p><p id="f80c" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">For a more comprehensive deep dive into this awesome new feature, please visit the <code class="cx nw nx ny nz b"><a class="af qg" href="https://api.flutter.dev/flutter/material/SelectionArea-class.html" rel="noopener ugc nofollow" target="_blank">SelectableArea</a></code><a class="af qg" href="https://api.flutter.dev/flutter/material/SelectionArea-class.html" rel="noopener ugc nofollow" target="_blank"> API</a> page.</p><h2 id="7e82" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Trackpad input</h2><p id="47a9" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">Flutter 3.3 provides improved support for trackpad input. This not only provides richer and smoother control, but also reduces misinterpretation in certain cases. For an example of this misinterpretation, check out the <a class="af qg" href="https://docs.flutter.dev/cookbook/effects/drag-a-widget" rel="noopener ugc nofollow" target="_blank">Drag a UI element</a> page in the <a class="af qg" href="https://docs.flutter.dev/cookbook" rel="noopener ugc nofollow" target="_blank">Flutter cookbook</a>. Scroll to the bottom of the page to get to the DartPad instance, and perform the following steps:</p><ol class=""><li id="3928" class="mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu qh qi qj bk">Size the window smaller so that the upper part presents a scrollbar</li><li id="974f" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qh qi qj bk">Hover over the upper part</li><li id="74ce" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qh qi qj bk">Use a trackpad to scroll</li><li id="1d58" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qh qi qj bk">Prior to installing Flutter 3.3, scrolling on a trackpad drags the item because Flutter was dispatching emulated general events</li><li id="afbb" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qh qi qj bk">After installing Flutter 3.3, scrolling on a trackpad correctly scrolls the list because Flutter is delivering the “scrolling” gesture, which isn’t recognized by the cards, but <em class="nv">is</em> recognized by the scroll view</li></ol><p id="e1e3" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">For more information, see the<a class="af qg" href="https://docs.google.com/document/d/1oRvebwjpsC3KlxN1gOYnEdxtNpQDYpPtUFAkmTUe-K8/edit?resourcekey=0-pt4_T7uggSTrsq2gWeGsYQ" rel="noopener ugc nofollow" target="_blank"> Flutter Trackpad Gesture</a> design doc, and the following PRs on GitHub:</p><ul class=""><li id="877d" class="mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu qp qi qj bk">PR 89944: <a class="af qg" href="https://github.com/flutter/flutter/pull/89944" rel="noopener ugc nofollow" target="_blank">Support trackpad gestures in framework</a></li><li id="92ea" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qp qi qj bk">PR 31591: <a class="af qg" href="https://github.com/flutter/engine/pull/31591" rel="noopener ugc nofollow" target="_blank">iPad trackpad gestures</a></li><li id="7077" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qp qi qj bk">PR 34060: <a class="af qg" href="https://github.com/flutter/engine/pull/34060" rel="noopener ugc nofollow" target="_blank">Re-land “ChromeOS/Android trackpad gestures”</a></li><li id="79fc" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qp qi qj bk">PR 31594: <a class="af qg" href="https://github.com/flutter/engine/pull/31594" rel="noopener ugc nofollow" target="_blank">Win32 trackpad gestures</a></li><li id="8f45" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qp qi qj bk">PR 31592: <a class="af qg" href="https://github.com/flutter/engine/pull/31592" rel="noopener ugc nofollow" target="_blank">Linux trackpad gestures</a></li><li id="b967" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qp qi qj bk">PR 31593: <a class="af qg" href="https://github.com/flutter/engine/pull/31593" rel="noopener ugc nofollow" target="_blank">Mac trackpad gesturesmacOS</a></li></ul><h2 id="1f42" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Scribble</h2><p id="6c60" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">Thanks to the amazing contributions of community member <a class="af qg" href="https://github.com/fbcouch" rel="noopener ugc nofollow" target="_blank">fbcouch</a>, Flutter now supports <a class="af qg" href="https://support.apple.com/guide/ipad/enter-text-with-scribble-ipad355ab2a7/ipados" rel="noopener ugc nofollow" target="_blank">Scribble</a> handwriting input using the Apple Pencil on iPadOS. This feature is enabled by default on <code class="cx nw nx ny nz b">CupertinoTextField</code>, <code class="cx nw nx ny nz b">TextField</code>, and <code class="cx nw nx ny nz b">EditableText</code>. To enable this feature for your end users, simply upgrade to Flutter 3.3.</p><figure class="pv pw px py pz qa ps pt paragraph-image"><div role="button" tabindex="0" class="qb qc fj qd bh qe"><div class="ps pt qq"><picture><source srcSet="https://miro.medium.com/v2/resize:fit:640/format:webp/0*SlsnQUfdOTijdsyF 640w, https://miro.medium.com/v2/resize:fit:720/format:webp/0*SlsnQUfdOTijdsyF 720w, https://miro.medium.com/v2/resize:fit:750/format:webp/0*SlsnQUfdOTijdsyF 750w, https://miro.medium.com/v2/resize:fit:786/format:webp/0*SlsnQUfdOTijdsyF 786w, https://miro.medium.com/v2/resize:fit:828/format:webp/0*SlsnQUfdOTijdsyF 828w, https://miro.medium.com/v2/resize:fit:1100/format:webp/0*SlsnQUfdOTijdsyF 1100w, https://miro.medium.com/v2/resize:fit:1400/format:webp/0*SlsnQUfdOTijdsyF 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px" type="image/webp"/><source data-testid="og" srcSet="https://miro.medium.com/v2/resize:fit:640/0*SlsnQUfdOTijdsyF 640w, https://miro.medium.com/v2/resize:fit:720/0*SlsnQUfdOTijdsyF 720w, https://miro.medium.com/v2/resize:fit:750/0*SlsnQUfdOTijdsyF 750w, https://miro.medium.com/v2/resize:fit:786/0*SlsnQUfdOTijdsyF 786w, https://miro.medium.com/v2/resize:fit:828/0*SlsnQUfdOTijdsyF 828w, https://miro.medium.com/v2/resize:fit:1100/0*SlsnQUfdOTijdsyF 1100w, https://miro.medium.com/v2/resize:fit:1400/0*SlsnQUfdOTijdsyF 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px"/><img alt="" class="bh me qf c" width="700" height="160" loading="lazy" role="presentation"/></picture></div></div></figure><h2 id="4e08" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Text input</h2><p id="e532" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">To improve support for rich text editing, this release introduces the ability to receive granular text updates from the platform’s <code class="cx nw nx ny nz b">TextInputPlugin</code>. Previously, the <code class="cx nw nx ny nz b">TextInputClient</code> only delivered the new editing state with no delta between the old and new, <code class="cx nw nx ny nz b">TextEditingDeltas</code> and the <code class="cx nw nx ny nz b">DeltaTextInputClient</code> fill this information gap. Having access to these deltas allows you to build an input field with styled ranges that expand and contract as you type. To learn more, check out the <a class="af qg" href="https://flutter.github.io/samples/rich_text_editor.html" rel="noopener ugc nofollow" target="_blank">Rich Text Editor demo</a>.</p><h1 id="f6d8" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">Material Design 3</h1><p id="74d3" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">The Flutter team continues to migrate more Material Design 3 components to Flutter. This release includes updates to <code class="cx nw nx ny nz b"><a class="af qg" href="https://api.flutter.dev/flutter/material/IconButton-class.html" rel="noopener ugc nofollow" target="_blank">IconButton</a></code>, <code class="cx nw nx ny nz b"><a class="af qg" href="https://api.flutter.dev/flutter/material/Chip-class.html" rel="noopener ugc nofollow" target="_blank">Chips</a></code>, and large and medium variants for <code class="cx nw nx ny nz b"><a class="af qg" href="https://api.flutter.dev/flutter/material/AppBar-class.html" rel="noopener ugc nofollow" target="_blank">AppBar</a></code>.</p><p id="7b92" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">To monitor the progress on the Material Design 3 migration, check out <a class="af qg" href="https://github.com/flutter/flutter/issues/91605" rel="noopener ugc nofollow" target="_blank">Bring Material 3 to Flutter</a> on GitHub.</p><h2 id="9f96" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">IconButton</h2><figure class="pv pw px py pz qa ps pt paragraph-image"><div role="button" tabindex="0" class="qb qc fj qd bh qe"><div class="ps pt qr"><picture><source srcSet="https://miro.medium.com/v2/resize:fit:640/format:webp/0*AxLlKvPfaiODtzch 640w, https://miro.medium.com/v2/resize:fit:720/format:webp/0*AxLlKvPfaiODtzch 720w, https://miro.medium.com/v2/resize:fit:750/format:webp/0*AxLlKvPfaiODtzch 750w, https://miro.medium.com/v2/resize:fit:786/format:webp/0*AxLlKvPfaiODtzch 786w, https://miro.medium.com/v2/resize:fit:828/format:webp/0*AxLlKvPfaiODtzch 828w, https://miro.medium.com/v2/resize:fit:1100/format:webp/0*AxLlKvPfaiODtzch 1100w, https://miro.medium.com/v2/resize:fit:1400/format:webp/0*AxLlKvPfaiODtzch 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px" type="image/webp"/><source data-testid="og" srcSet="https://miro.medium.com/v2/resize:fit:640/0*AxLlKvPfaiODtzch 640w, https://miro.medium.com/v2/resize:fit:720/0*AxLlKvPfaiODtzch 720w, https://miro.medium.com/v2/resize:fit:750/0*AxLlKvPfaiODtzch 750w, https://miro.medium.com/v2/resize:fit:786/0*AxLlKvPfaiODtzch 786w, https://miro.medium.com/v2/resize:fit:828/0*AxLlKvPfaiODtzch 828w, https://miro.medium.com/v2/resize:fit:1100/0*AxLlKvPfaiODtzch 1100w, https://miro.medium.com/v2/resize:fit:1400/0*AxLlKvPfaiODtzch 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px"/><img alt="" class="bh me qf c" width="700" height="189" loading="lazy" role="presentation"/></picture></div></div></figure><h2 id="4d79" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Chip</h2><figure class="pv pw px py pz qa ps pt paragraph-image"><div role="button" tabindex="0" class="qb qc fj qd bh qe"><div class="ps pt qs"><picture><source srcSet="https://miro.medium.com/v2/resize:fit:640/format:webp/0*5fCsX84PRpjMtzx5 640w, https://miro.medium.com/v2/resize:fit:720/format:webp/0*5fCsX84PRpjMtzx5 720w, https://miro.medium.com/v2/resize:fit:750/format:webp/0*5fCsX84PRpjMtzx5 750w, https://miro.medium.com/v2/resize:fit:786/format:webp/0*5fCsX84PRpjMtzx5 786w, https://miro.medium.com/v2/resize:fit:828/format:webp/0*5fCsX84PRpjMtzx5 828w, https://miro.medium.com/v2/resize:fit:1100/format:webp/0*5fCsX84PRpjMtzx5 1100w, https://miro.medium.com/v2/resize:fit:1400/format:webp/0*5fCsX84PRpjMtzx5 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px" type="image/webp"/><source data-testid="og" srcSet="https://miro.medium.com/v2/resize:fit:640/0*5fCsX84PRpjMtzx5 640w, https://miro.medium.com/v2/resize:fit:720/0*5fCsX84PRpjMtzx5 720w, https://miro.medium.com/v2/resize:fit:750/0*5fCsX84PRpjMtzx5 750w, https://miro.medium.com/v2/resize:fit:786/0*5fCsX84PRpjMtzx5 786w, https://miro.medium.com/v2/resize:fit:828/0*5fCsX84PRpjMtzx5 828w, https://miro.medium.com/v2/resize:fit:1100/0*5fCsX84PRpjMtzx5 1100w, https://miro.medium.com/v2/resize:fit:1400/0*5fCsX84PRpjMtzx5 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px"/><img alt="" class="bh me qf c" width="700" height="730" loading="lazy" role="presentation"/></picture></div></div></figure><h2 id="c1e1" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Medium and large AppBar</h2><figure class="pv pw px py pz qa ps pt paragraph-image"><div class="ps pt qt"><picture><source srcSet="https://miro.medium.com/v2/resize:fit:640/format:webp/0*jVFZWFsCOuzeqzTb 640w, https://miro.medium.com/v2/resize:fit:720/format:webp/0*jVFZWFsCOuzeqzTb 720w, https://miro.medium.com/v2/resize:fit:750/format:webp/0*jVFZWFsCOuzeqzTb 750w, https://miro.medium.com/v2/resize:fit:786/format:webp/0*jVFZWFsCOuzeqzTb 786w, https://miro.medium.com/v2/resize:fit:828/format:webp/0*jVFZWFsCOuzeqzTb 828w, https://miro.medium.com/v2/resize:fit:1100/format:webp/0*jVFZWFsCOuzeqzTb 1100w, https://miro.medium.com/v2/resize:fit:1044/format:webp/0*jVFZWFsCOuzeqzTb 1044w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 522px" type="image/webp"/><source data-testid="og" srcSet="https://miro.medium.com/v2/resize:fit:640/0*jVFZWFsCOuzeqzTb 640w, https://miro.medium.com/v2/resize:fit:720/0*jVFZWFsCOuzeqzTb 720w, https://miro.medium.com/v2/resize:fit:750/0*jVFZWFsCOuzeqzTb 750w, https://miro.medium.com/v2/resize:fit:786/0*jVFZWFsCOuzeqzTb 786w, https://miro.medium.com/v2/resize:fit:828/0*jVFZWFsCOuzeqzTb 828w, https://miro.medium.com/v2/resize:fit:1100/0*jVFZWFsCOuzeqzTb 1100w, https://miro.medium.com/v2/resize:fit:1044/0*jVFZWFsCOuzeqzTb 1044w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 522px"/><img alt="" class="bh me qf c" width="522" height="291" loading="lazy" role="presentation"/></picture></div></figure><figure class="pv pw px py pz qa ps pt paragraph-image"><div class="ps pt qt"><picture><source srcSet="https://miro.medium.com/v2/resize:fit:640/format:webp/0*c4wovLXB8TpulHVU 640w, https://miro.medium.com/v2/resize:fit:720/format:webp/0*c4wovLXB8TpulHVU 720w, https://miro.medium.com/v2/resize:fit:750/format:webp/0*c4wovLXB8TpulHVU 750w, https://miro.medium.com/v2/resize:fit:786/format:webp/0*c4wovLXB8TpulHVU 786w, https://miro.medium.com/v2/resize:fit:828/format:webp/0*c4wovLXB8TpulHVU 828w, https://miro.medium.com/v2/resize:fit:1100/format:webp/0*c4wovLXB8TpulHVU 1100w, https://miro.medium.com/v2/resize:fit:1044/format:webp/0*c4wovLXB8TpulHVU 1044w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 522px" type="image/webp"/><source data-testid="og" srcSet="https://miro.medium.com/v2/resize:fit:640/0*c4wovLXB8TpulHVU 640w, https://miro.medium.com/v2/resize:fit:720/0*c4wovLXB8TpulHVU 720w, https://miro.medium.com/v2/resize:fit:750/0*c4wovLXB8TpulHVU 750w, https://miro.medium.com/v2/resize:fit:786/0*c4wovLXB8TpulHVU 786w, https://miro.medium.com/v2/resize:fit:828/0*c4wovLXB8TpulHVU 828w, https://miro.medium.com/v2/resize:fit:1100/0*c4wovLXB8TpulHVU 1100w, https://miro.medium.com/v2/resize:fit:1044/0*c4wovLXB8TpulHVU 1044w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 522px"/><img alt="" class="bh me qf c" width="522" height="291" loading="lazy" role="presentation"/></picture></div></figure><h1 id="03a6" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">Desktop</h1><h2 id="5edb" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Windows</h2><p id="3a9f" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">Previously, the Windows desktop application’s version was set by a file specific to the Windows application. This behavior was inconsistent with the way other platforms set their versions.</p><p id="8250" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">Windows desktop application versions can now be set from your projects <code class="cx nw nx ny nz b">pubspec.yaml</code> file and build arguments. This makes it easier to enable auto updates for your end customers to get the latest and greatest when an application update is pushed.</p><p id="a99c" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">For more information on setting your applications version, follow the documentation on <a class="af qg" href="https://docs.flutter.dev/deployment/windows#updating-the-apps-version-number" rel="noopener ugc nofollow" target="_blank">docs.flutter.dev</a> and the <a class="af qg" href="https://docs.flutter.dev/development/platform-integration/windows/version-migration" rel="noopener ugc nofollow" target="_blank">migration guide</a>. Projects created before Flutter 3.3 need to be updated to get this feature.</p><h1 id="c39f" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">Packages</h1><h2 id="8fe7" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">go_router</h2><p id="6a19" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">When designing apps with complex navigation needs, things can get pretty hard to wrap your head around. To extend Flutter’s native navigation API, the team has published a new version of the <code class="cx nw nx ny nz b">go_router</code> package, making it simpler to design routing logic that works across mobile, desktop, and the web.</p><p id="8ec1" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">The <code class="cx nw nx ny nz b"><a class="af qg" href="https://pub.dev/packages/go_router" rel="noopener ugc nofollow" target="_blank">go router</a></code> package, maintained by the Flutter team, simplifies routing by providing a declarative, url-based API, making it easier to navigate and handle deep-links. The latest version (4.3) enables apps to redirect using asynchronous code, and includes other breaking changes described in the <a class="af qg" href="https://docs.google.com/document/d/10l22o4ml4Ss83UyzqUC8_xYOv_QjZEi80lJDNE4q7wM/edit?usp=sharing&resourcekey=0-U-BXBQzNfkk4v241Ow-vZg" rel="noopener ugc nofollow" target="_blank">migration guide</a>.</p><p id="15f7" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">For more information, check out the <a class="af qg" href="https://docs.flutter.dev/development/ui/navigation" rel="noopener ugc nofollow" target="_blank">Navigation and routing</a> page on docs.flutter.dev.</p><h1 id="9e02" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">VS Code extension enhancements</h1><p id="66e0" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">The Visual Studio Code extension for Flutter has several updates including improvements for adding dependencies. You can now add multiple, comma-separated dependencies in one step using <strong class="mz gv">Dart: Add Dependency</strong>.</p><figure class="pv pw px py pz qa ps pt paragraph-image"><div class="ps pt qu"><picture><source srcSet="https://miro.medium.com/v2/resize:fit:640/format:webp/0*vFIZ4WL4UWSTrC27 640w, https://miro.medium.com/v2/resize:fit:720/format:webp/0*vFIZ4WL4UWSTrC27 720w, https://miro.medium.com/v2/resize:fit:750/format:webp/0*vFIZ4WL4UWSTrC27 750w, https://miro.medium.com/v2/resize:fit:786/format:webp/0*vFIZ4WL4UWSTrC27 786w, https://miro.medium.com/v2/resize:fit:828/format:webp/0*vFIZ4WL4UWSTrC27 828w, https://miro.medium.com/v2/resize:fit:1100/format:webp/0*vFIZ4WL4UWSTrC27 1100w, https://miro.medium.com/v2/resize:fit:1376/format:webp/0*vFIZ4WL4UWSTrC27 1376w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 688px" type="image/webp"/><source data-testid="og" srcSet="https://miro.medium.com/v2/resize:fit:640/0*vFIZ4WL4UWSTrC27 640w, https://miro.medium.com/v2/resize:fit:720/0*vFIZ4WL4UWSTrC27 720w, https://miro.medium.com/v2/resize:fit:750/0*vFIZ4WL4UWSTrC27 750w, https://miro.medium.com/v2/resize:fit:786/0*vFIZ4WL4UWSTrC27 786w, https://miro.medium.com/v2/resize:fit:828/0*vFIZ4WL4UWSTrC27 828w, https://miro.medium.com/v2/resize:fit:1100/0*vFIZ4WL4UWSTrC27 1100w, https://miro.medium.com/v2/resize:fit:1376/0*vFIZ4WL4UWSTrC27 1376w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 688px"/><img alt="" class="bh me qf c" width="688" height="280" loading="lazy" role="presentation"/></picture></div></figure><p id="3f2a" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">You can read about the Visual Studio Code extension enhancements made since the last Flutter stable release at:</p><ul class=""><li id="1dd7" class="mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu qp qi qj bk"><a class="af qg" href="https://groups.google.com/g/flutter-announce/c/u1iSDMtKMVg" rel="noopener ugc nofollow" target="_blank">VS Code extensions v3.46</a></li><li id="7a5a" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qp qi qj bk"><a class="af qg" href="https://groups.google.com/g/flutter-announce/c/x4m9o93-Dng" rel="noopener ugc nofollow" target="_blank">VS Code extensions v3.44</a></li><li id="31d4" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qp qi qj bk"><a class="af qg" href="https://groups.google.com/g/flutter-announce/c/45Wsk5pISx4" rel="noopener ugc nofollow" target="_blank">VS Code extensions v3.42</a></li></ul><h1 id="4112" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">Flutter DevTools updates</h1><p id="9148" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">DevTools comes with a number of updates since the last stable Flutter release, including UX and performance improvements to data display tables for faster, less jittery scrolling of large lists of events (<a class="af qg" href="https://github.com/flutter/devtools/pull/4175" rel="noopener ugc nofollow" target="_blank">#4175</a>).</p><p id="57bb" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">For the complete list of updates since Flutter 3.0, check out the individual announcements here:</p><ul class=""><li id="a04f" class="mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu qp qi qj bk"><a class="af qg" href="https://docs.flutter.dev/development/tools/devtools/release-notes/release-notes-2.16.0" rel="noopener ugc nofollow" target="_blank">Flutter DevTools 2.16.0 release notes</a></li><li id="c3a1" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qp qi qj bk"><a class="af qg" href="https://docs.flutter.dev/development/tools/devtools/release-notes/release-notes-2.15.0" rel="noopener ugc nofollow" target="_blank">Flutter DevTools 2.15.0 release notes</a></li><li id="66c4" class="mx my gu mz b na qk nc nd ne ql ng nh ni qm nk nl nm qn no np nq qo ns nt nu qp qi qj bk"><a class="af qg" href="https://docs.flutter.dev/development/tools/devtools/release-notes/release-notes-2.14.0" rel="noopener ugc nofollow" target="_blank">Flutter DevTools 2.14.0 release notes</a></li></ul><h1 id="9286" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">Performance</h1><h2 id="0ce9" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Raster cache improvements</h2><p id="7adc" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">This release increases the performance of loading images from assets by eliminating copies and reducing Dart garbage collection (GC) pressure. Previously, when loading asset images, the <code class="cx nw nx ny nz b">ImageProvider</code> API required the compressed data to be copied multiple times. First, it was copied into the native heap when opening the asset and exposing it to Dart as a typed data array. Then, it was copied a second time when that typed data array was copied to the internal storage of a <code class="cx nw nx ny nz b">ui.ImmutableBuffer</code>.</p><p id="2c36" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">With <a class="af qg" href="https://github.com/flutter/engine/pull/32999" rel="noopener ugc nofollow" target="_blank">the addition</a> of <code class="cx nw nx ny nz b">ui.ImmutableBuffer.fromAsset</code>, compressed image bytes can be loaded directly into the structure used for decoding. This approach <a class="af qg" href="https://github.com/flutter/flutter/pull/103496" rel="noopener ugc nofollow" target="_blank">requires changes</a> to the byte loading pipeline of <code class="cx nw nx ny nz b">ImageProviders</code>. This process is also faster, because it bypasses some additional scheduling overhead required bythe previous method channel-based loader. In particular, image loading time improved by nearly 2x in our microbenchmarks.</p><figure class="pv pw px py pz qa ps pt paragraph-image"><div role="button" tabindex="0" class="qb qc fj qd bh qe"><div class="ps pt qv"><picture><source srcSet="https://miro.medium.com/v2/resize:fit:640/format:webp/0*dZTaQMQri0EI7HCw 640w, https://miro.medium.com/v2/resize:fit:720/format:webp/0*dZTaQMQri0EI7HCw 720w, https://miro.medium.com/v2/resize:fit:750/format:webp/0*dZTaQMQri0EI7HCw 750w, https://miro.medium.com/v2/resize:fit:786/format:webp/0*dZTaQMQri0EI7HCw 786w, https://miro.medium.com/v2/resize:fit:828/format:webp/0*dZTaQMQri0EI7HCw 828w, https://miro.medium.com/v2/resize:fit:1100/format:webp/0*dZTaQMQri0EI7HCw 1100w, https://miro.medium.com/v2/resize:fit:1400/format:webp/0*dZTaQMQri0EI7HCw 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px" type="image/webp"/><source data-testid="og" srcSet="https://miro.medium.com/v2/resize:fit:640/0*dZTaQMQri0EI7HCw 640w, https://miro.medium.com/v2/resize:fit:720/0*dZTaQMQri0EI7HCw 720w, https://miro.medium.com/v2/resize:fit:750/0*dZTaQMQri0EI7HCw 750w, https://miro.medium.com/v2/resize:fit:786/0*dZTaQMQri0EI7HCw 786w, https://miro.medium.com/v2/resize:fit:828/0*dZTaQMQri0EI7HCw 828w, https://miro.medium.com/v2/resize:fit:1100/0*dZTaQMQri0EI7HCw 1100w, https://miro.medium.com/v2/resize:fit:1400/0*dZTaQMQri0EI7HCw 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px"/><img alt="" class="bh me qf c" width="700" height="548" loading="lazy" role="presentation"/></picture></div></div></figure><p id="3485" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">For more information and a migration guide, see <a class="af qg" href="https://docs.flutter.dev/release/breaking-changes/image-provider-load-buffer" rel="noopener ugc nofollow" target="_blank">Adding ImageProvider.loadBuffer</a> on docs.flutter.dev.</p><h1 id="511e" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">Stability</h1><h2 id="388d" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">iOS pointer compression disabled</h2><p id="f9a6" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">In the 2.10 stable release, we enabled Dart’s <a class="af qg" rel="noopener" href="/dartlang/dart-2-15-7e7a598e508a#0c15">pointer compression optimization</a> on iOS. However, <a class="af qg" href="https://github.com/Yeatse" rel="noopener ugc nofollow" target="_blank">Yeatse</a>, on GitHub, <a class="af qg" href="https://github.com/flutter/flutter/issues/105183" rel="noopener ugc nofollow" target="_blank">alerted us</a> to an unintended consequence of the optimization. Dart’s pointer compression works by reserving a large virtual memory region for Dart’s heap. Since the total virtual memory allocation allowed on iOS is less than on other platforms, this large reservation reduces the amount of memory available for use by other components that reserve their own memory, for example, Flutter plugins.</p><p id="1f2c" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">While disabling pointer compression increases the memory consumed by Dart objects, it also increases the memory <em class="nv">available</em> for non-Dart parts of a Flutter application, which is more desirable overall.</p><p id="20f6" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">Apple provides an entitlement that can increase the maximum allowed virtual memory allocation for an application, however this entitlement is only supported on newer iOS versions, and wouldn’t work on devices running versions of iOS that Flutter still supports. When we are able to use this entitlement everywhere, we intend to revisit this optimization.</p><h1 id="54c0" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">API improvements</h1><h2 id="d668" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">PlatformDispatcher.onError</h2><p id="902e" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">In previous releases, you had to manually configure a custom <code class="cx nw nx ny nz b">Zone</code> in order to catch all of an application’s exceptions and errors. However, custom <code class="cx nw nx ny nz b">Zone</code>s were detrimental to a number of optimizations in Dart’s core libraries, which slowed down application start-up time. <strong class="mz gv">In this release, instead of using a custom </strong><code class="cx nw nx ny nz b"><strong class="mz gv">Zone</strong></code><strong class="mz gv">, you should catch all errors and exceptions by setting the </strong><code class="cx nw nx ny nz b"><strong class="mz gv">PlatformDispatcher.onError</strong></code><strong class="mz gv"> callback.</strong> For more information, check out the updated <a class="af qg" href="https://docs.flutter.dev/testing/errors" rel="noopener ugc nofollow" target="_blank">Handling errors in Flutter</a> page on docs.flutter.dev.</p><h2 id="6033" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">FragmentProgram changes</h2><p id="80b6" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">Fragment shaders written in GLSL and listed under a <code class="cx nw nx ny nz b">shaders:</code> section in the Flutter manifest of an application’s <code class="cx nw nx ny nz b">pubspec.yaml</code> file will now be automatically compiled to the correct format understood by the Engine and bundled with the application as an asset. Thanks to this change, you will no longer have to manually compile shaders using third-party tools. Going forward, you should regard the Engine’s <code class="cx nw nx ny nz b">FragmentProgram</code> API as accepting only the output of Flutter’s build tooling. This isn’t yet the case, but this change is planned for a future release, as described in the <a class="af qg" href="http://flutter.dev/go/fragment-program-support" rel="noopener ugc nofollow" target="_blank">FragmentProgram API Support improvements</a> design doc.</p><p id="1d68" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">For an example of this change, see this <a class="af qg" href="https://github.com/zanderso/fragment_shader_example" rel="noopener ugc nofollow" target="_blank">Flutter shader example</a>.</p><h2 id="18d9" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Fractional translation</h2><p id="0e68" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">Previously, the Flutter Engine would always align composited layers to exact pixel boundaries because it improved rendering performance on older (32-bit) model iPhones. Since adding desktop support, we’ve noticed that this led to observable snapping behavior, since screen device pixel ratios are commonly much lower. For example, on low DPR screens, tooltips could be seen visibly snapping when fading in. After determining that this pixel snapping was no longer necessary for performance on newer iPhone models, <a class="af qg" href="https://github.com/flutter/flutter/issues/103909" rel="noopener ugc nofollow" target="_blank">we’ve removed this pixel snapping</a> from the Flutter Engine to improve desktop fidelity. Additionally, we also found that removing this pixel snapping stabilized a number of our golden image tests, which would frequently change with small hairline rendering differences.</p><h1 id="73be" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">Changes to supported platforms</h1><h2 id="be70" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">32-bit iOS deprecation</h2><p id="79f3" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">As we announced earlier with the 3.0 stable release, due to decreased usage, that release was the <a class="af qg" href="http://flutter.dev/go/rfc-32-bit-ios-unsupported" rel="noopener ugc nofollow" target="_blank">last one to support 32-bit iOS devices and iOS versions 9 and 10</a>. This change affects the iPhone 4S, iPhone 5, iPhone 5C, and the 2nd, 3d, and 4th generation iPad devices. The 3.3 stable version of Flutter and all following stable releases no longer support 32-bit iOS devices and iOS versions 9 and 10. This means that apps built against Flutter 3.3 and later won’t run on those devices.</p><h2 id="19cd" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Sunsetting macOS 10.11 and 10.12</h2><p id="8c17" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">In the Q4 2022 stable release, we expect to drop support for macOS versions 10.11 and 10.12. This means that apps built against stable Flutter SDKs after that point will no longer work on these versions, and the minimum macOS version supported by Flutter will increase to 10.13 High Sierra.</p><h2 id="04f3" class="oy ob gu bf oc oz pa dy og pb pc ea ok ni pd pe pf nm pg ph pi nq pj pk pl pm bk">Bitcode deprecation</h2><p id="ed3e" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">Bitcode <a class="af qg" href="https://developer.apple.com/documentation/xcode-release-notes/xcode-14-release-notes" rel="noopener ugc nofollow" target="_blank">will no longer be accepted for iOS app submission in the upcoming Xcode 14 release</a>, and projects with bitcode enabled will emit a build warning in this version of Xcode. In light of this, Flutter will drop support for bitcode in a future stable release.</p><p id="ea35" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">By default, Flutter apps don’t have bitcode enabled, and we don’t expect this to impact many developers. However, if you have enabled bitcode manually in your Xcode project, disable it as soon as you upgrade to Xcode 14. You can do so by opening <code class="cx nw nx ny nz b">ios/Runner.xcworkspace</code> and setting the build setting <strong class="mz gv">Enable Bitcode</strong> to <strong class="mz gv">No</strong>. Add-to-app developers should disable it in the host Xcode project.</p><figure class="pv pw px py pz qa ps pt paragraph-image"><div role="button" tabindex="0" class="qb qc fj qd bh qe"><div class="ps pt qw"><picture><source srcSet="https://miro.medium.com/v2/resize:fit:640/format:webp/0*4EQPd4ednGIAhMwl 640w, https://miro.medium.com/v2/resize:fit:720/format:webp/0*4EQPd4ednGIAhMwl 720w, https://miro.medium.com/v2/resize:fit:750/format:webp/0*4EQPd4ednGIAhMwl 750w, https://miro.medium.com/v2/resize:fit:786/format:webp/0*4EQPd4ednGIAhMwl 786w, https://miro.medium.com/v2/resize:fit:828/format:webp/0*4EQPd4ednGIAhMwl 828w, https://miro.medium.com/v2/resize:fit:1100/format:webp/0*4EQPd4ednGIAhMwl 1100w, https://miro.medium.com/v2/resize:fit:1400/format:webp/0*4EQPd4ednGIAhMwl 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px" type="image/webp"/><source data-testid="og" srcSet="https://miro.medium.com/v2/resize:fit:640/0*4EQPd4ednGIAhMwl 640w, https://miro.medium.com/v2/resize:fit:720/0*4EQPd4ednGIAhMwl 720w, https://miro.medium.com/v2/resize:fit:750/0*4EQPd4ednGIAhMwl 750w, https://miro.medium.com/v2/resize:fit:786/0*4EQPd4ednGIAhMwl 786w, https://miro.medium.com/v2/resize:fit:828/0*4EQPd4ednGIAhMwl 828w, https://miro.medium.com/v2/resize:fit:1100/0*4EQPd4ednGIAhMwl 1100w, https://miro.medium.com/v2/resize:fit:1400/0*4EQPd4ednGIAhMwl 1400w" sizes="(min-resolution: 4dppx) and (max-width: 700px) 50vw, (-webkit-min-device-pixel-ratio: 4) and (max-width: 700px) 50vw, (min-resolution: 3dppx) and (max-width: 700px) 67vw, (-webkit-min-device-pixel-ratio: 3) and (max-width: 700px) 65vw, (min-resolution: 2.5dppx) and (max-width: 700px) 80vw, (-webkit-min-device-pixel-ratio: 2.5) and (max-width: 700px) 80vw, (min-resolution: 2dppx) and (max-width: 700px) 100vw, (-webkit-min-device-pixel-ratio: 2) and (max-width: 700px) 100vw, 700px"/><img alt="" class="bh me qf c" width="700" height="332" loading="lazy" role="presentation"/></picture></div></div></figure><p id="88c9" class="pw-post-body-paragraph mx my gu mz b na nb nc nd ne nf ng nh ni nj nk nl nm nn no np nq nr ns nt nu gn bk">See <a class="af qg" href="https://help.apple.com/xcode/mac/11.0/index.html?localePath=en.lproj#/devde46df08a" rel="noopener ugc nofollow" target="_blank">Apple’s documentation</a> to learn more about bitcode distribution.</p><h1 id="7129" class="oa ob gu bf oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox bk">Summary</h1><p id="709b" class="pw-post-body-paragraph mx my gu mz b na pn nc nd ne po ng nh ni pp nk nl nm pq no np nq pr ns nt nu gn bk">As we always say, the Flutter team at Google is extremely grateful for the incredible work the community puts in to make Flutter the wonderful experience that it is! 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href="/@kevinchisholm/followers?source=post_page---post_author_info--893c7b9af1ff--------------------------------">11.7K Followers</a></span></div><div class="bf b bg z du ab jd"><span class="ir l" aria-hidden="true"><span class="bf b bg z du">·</span></span><a class="af ag ah ai aj ak al am an ao ap aq ar iq" rel="noopener follow" href="/@kevinchisholm/following?source=post_page---post_author_info--893c7b9af1ff--------------------------------">7 Following</a></div></div><div class="ti l"><p class="bf b bg z bk"><span class="gn">Kevin Chisholm is a Technical Program Manager for Dart and Flutter at Google.</span></p></div></div></div><div class="h k"><div class="ab"><span><button class="bf b bg z tj rb tk tl tm tn to ev ew tp tq tr fa fb fc fd bm fe ff">Follow</button></span></div></div></div></div></div></div><div class="ts tt tu tv tw l"><div class="sa bh r ts tt tx ty tz"></div><div class="ab cb"><div class="ci bh fz ga gb gc"><div class="ab q cp"><h2 class="bf tb od of og oh oj ok 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