Hydration error when installing NextJS 15

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data-article-slug="hydration-error-when-installing-nextjs-15-1eb3" data-author-id="1172895" data-author-name="Md Shykat" data-author-username="pains_arch" data-co-author-ids="" data-path="/pains_arch/hydration-error-when-installing-nextjs-15-1eb3" data-pin-path="/stories/feed/pinned_article" data-pinned-article-id="" data-published="true" data-scheduled="false" lang=en > <header class="crayons-article__header" id="main-title"> <a class="crayons-article__cover" href="https://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F50b5s1eh84is2ilpy3c2.png"> <img src="https://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F50b5s1eh84is2ilpy3c2.png" style="aspect-ratio: auto 1000 / 420;" width="1000" height="420" class="crayons-article__cover__image" alt="Cover image for Hydration error 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0.10); --tag-prefix: #f7df1e; --tag-bg-hover: rgba(247, 223, 30, 0.10); --tag-prefix-hover: #f7df1e; " href="/t/javascript"><span class="crayons-tag__prefix">#</span>javascript</a> <a class="crayons-tag " style=" --tag-bg: rgba(34, 34, 34, 0.10); --tag-prefix: #222222; --tag-bg-hover: rgba(34, 34, 34, 0.10); --tag-prefix-hover: #222222; " href="/t/react"><span class="crayons-tag__prefix">#</span>react</a> </div> </div> </header> <div class="crayons-article__main "> <div class="crayons-article__body text-styles spec__body" data-article-id="2115429" id="article-body"> <p>After creating a new next 15 project and running the server<br> </p> <div class="highlight js-code-highlight"> <pre class="highlight plaintext"><code>npm run dev </code></pre> <div class="highlight__panel js-actions-panel"> <div class="highlight__panel-action js-fullscreen-code-action"> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-on"><title>Enter fullscreen mode</title> <path d="M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z"></path> </svg> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-off"><title>Exit fullscreen mode</title> <path d="M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z"></path> </svg> </div> </div> </div> <p>if see these error in your development server:</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Ftsj63dzdwfsdjbk8wdso.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Ftsj63dzdwfsdjbk8wdso.png" alt="Image description" loading="lazy" width="199" height="76"></a></p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fh4ku3yyn08edobdvzows.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fh4ku3yyn08edobdvzows.png" alt="Image description" loading="lazy" width="800" height="465"></a></p> <p><strong>Hydration failed because the server rendered HTML didn't match the client. As a result this tree will be regenerated on the client. This can happen if a SSR-ed Client Component used</strong></p> <ul> <li>A server/client branch <code>if (typeof window !== 'undefined')</code>.</li> <li>Variable input such as <code>Date.now()</code> or <code>Math.random()</code> which changes each time it's called.</li> <li>Date formatting in a user's locale which doesn't match the server.</li> <li>External changing data without sending a snapshot of it along with the HTML.</li> <li>Invalid HTML tag nesting.</li> </ul> <p>It can also happen if the client has a browser extension installed which messes with the HTML before React loaded.</p> <p>See more info here: <a href="https://nextjs.org/docs/messages/react-hydration-error" target="_blank" rel="noopener noreferrer">https://nextjs.org/docs/messages/react-hydration-error</a></p> <h2> <a name="here-is-the-solve" href="#here-is-the-solve"> </a> Here is the solve </h2> <p>use this <strong>suppressHydrationWarning</strong> attribute in your layout.tsx file<br> </p> <div class="highlight js-code-highlight"> <pre class="highlight plaintext"><code>return ( <html lang='en' suppressHydrationWarning> </code></pre> <div class="highlight__panel js-actions-panel"> <div class="highlight__panel-action js-fullscreen-code-action"> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-on"><title>Enter fullscreen mode</title> <path d="M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z"></path> </svg> <svg xmlns="http://www.w3.org/2000/svg" width="20px" height="20px" viewbox="0 0 24 24" class="highlight-action crayons-icon highlight-action--fullscreen-off"><title>Exit fullscreen mode</title> <path d="M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z"></path> </svg> </div> </div> </div> <p>if this doesn't solve your problem, then So far these are the mentioned extensions that cause hydration errors I have seen here. You guys can add up further names to gather them in a single place to help other fellow devs:</p> <p>1 - ColorZilla</p> <p>2 - Wappalyzer</p> <p>3 - Urban VPN</p> <p>4 - LastPass</p> <p>5 - Hacker Vision</p> <p>6 - WhatFont</p> <p>7 - Video Speed Controller for HTML videos</p> <p>8 - Glot</p> <p>9 - AI Grammar Checker & Paraphraser – LanguageTool</p> <p>10 - Grammarly</p> <p>11 - Invert</p> <p>12 - Dashlane</p> <h1> <a name="happy-coding-" href="#happy-coding-"> </a> Happy Coding :) </h1> </div> <div class="js-billboard-container body-billboard-container" data-async-url="/pains_arch/hydration-error-when-installing-nextjs-15-1eb3/billboards/post_body_bottom"></div> </div> <section id="comments" data-follow-button-container="true" data-updated-at="2024-11-26 18:06:14 UTC" class="text-padding mb-4 border-t-1 border-0 border-solid border-base-10"> <header class="relative flex justify-between items-center mb-6"> <div class="flex items-center"> <h2 class="crayons-subtitle-1"> Top comments 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