{"id":53171,"date":"2024-05-16T10:50:56","date_gmt":"2024-05-16T08:50:56","guid":{"rendered":"https:\/\/www.inovex.de\/?p=53171"},"modified":"2024-05-24T12:43:00","modified_gmt":"2024-05-24T10:43:00","slug":"react-19-react-compiler-elevating-developer-experience-without-compromising-performance","status":"publish","type":"post","link":"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/","title":{"rendered":"React 19 &amp; React Compiler: Elevating Developer Experience Without Compromising Performance"},"content":{"rendered":"<p>The world of front-end development is constantly evolving, with new frameworks and libraries continuously emerging to expand the possibilities of web development. Amidst this dynamic landscape, React has established itself as a pivotal tool for modern web development, renowned for its user-friendly nature, adaptability, and high performance. The highly anticipated release of React 19 is a big step in the library&#8217;s progression. <a href=\"https:\/\/react.dev\/blog\/2024\/04\/25\/react-19\">React 19 RC, a.k.a. Release Candidate<\/a>, is already available on npm for those, who want to experience early &#8222;dopamine rush&#8220;. This article will discuss the new features in React 19 and React Compiler, how they both improve the developer experience and aid in making web applications more dynamic, efficient, and user-friendly.<!--more--><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Contents<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#The-main-contributor-%E2%80%93-React-Compiler\" >The main contributor \u2013 React Compiler<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#What-problems-does-React-Compiler-solve\" >What problems does React Compiler solve?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#React-19-features\" >React 19 features<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#use-API\" >use() API<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#useOptimistic-Hook\" >useOptimistic() Hook<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#Directives\" >Directives<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#Actions\" >Actions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#useActionState-and-useFormStatus\" >useActionState() and useFormStatus()<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#Asset-loading\" >Asset loading<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#Document-metadata\" >Document metadata<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#Web-components\" >Web components<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#ref-as-a-regular-prop\" >ref as a regular prop<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#Summary\" >Summary<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.inovex.de\/de\/blog\/react-19-react-compiler-elevating-developer-experience-without-compromising-performance\/#Resources-and-Links\" >Resources and Links<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"The-main-contributor-%E2%80%93-React-Compiler\"><\/span>The main contributor \u2013 React Compiler<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The React Team first mentioned React Compiler, initially called React Forget, back in 2021. Since then, the developer community seemed to have forgotten about React Forget (no pun intended). However, it has not been overlooked by the React team, and it went <a href=\"https:\/\/github.com\/reactwg\/react-compiler\">open source<\/a> right after <a href=\"https:\/\/conf.react.dev\/\">React Conf 2024<\/a>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What-problems-does-React-Compiler-solve\"><\/span>What problems does React Compiler solve?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The first and foremost highlight of the React Compiler is its automatic memoization feature. In simple terms, this prevents unnecessary re-renders, addressing a problem that React had previously tackled through manual \u201cmemoization\u201c strategies using well-known hooks such as <code>useMemo<\/code> and <code>useCallback<\/code>, as well as the <code>memo<\/code> API.<\/p>\n<p>To illustrate this, let&#8217;s examine a basic React Component:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-53181 \" src=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_1.png\" alt=\"Screenshot from a VS Code editor, that shows React Component called FilterTab, which, in turn, renders two additional components called Heading and FilterList\" width=\"994\" height=\"363\" srcset=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_1.png 1224w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_1-300x110.png 300w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_1-1024x374.png 1024w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_1-768x280.png 768w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_1-400x146.png 400w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_1-360x131.png 360w\" sizes=\"auto, (max-width: 994px) 100vw, 994px\" \/><\/p>\n<p><code>&lt;FilterTab\/&gt;<\/code> is a component that renders two additional components and serves as a parent of both. This code looks pretty, doesn&#8217;t it? However, if we ship it as it is, we might face such problems as unnecessary re-renders. What if only the heading changes? Due to the way React works, the entire component will re-render including its children. In this particular case, <code>filteredList<\/code> will be created anew and passed down to <code>&lt;FilteredList\/&gt;<\/code> causing it to re-render.<\/p>\n<p>Manual memoization to the rescue! In this case, we can wrap <code>filteredList<\/code> in <code>useMemo<\/code> hook and make it dependable only on list and <code>filterCondition<\/code>:<\/p>\n<h3><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-53183 \" src=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_2_with_useMemo.png\" alt=\"A screenshot from a Code editor which shows react component written in JSX\" width=\"808\" height=\"435\" srcset=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_2_with_useMemo.png 1100w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_2_with_useMemo-300x161.png 300w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_2_with_useMemo-1024x551.png 1024w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_2_with_useMemo-768x412.png 768w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_2_with_useMemo-400x215.png 400w, https:\/\/www.inovex.de\/wp-content\/uploads\/Compiler_example_2_with_useMemo-360x194.png 360w\" sizes=\"auto, (max-width: 808px) 100vw, 808px\" \/><\/h3>\n<h3><\/h3>\n<p>This code does not look too shabby, either. Unfortunately, using the <code>useMemo<\/code> hook does only half of the job. Now, if the heading changes, we do not recompute the <code>filteredList<\/code>. Still, <code>&lt;FilterTab&gt;<\/code> will cause <code>&lt;FilteredList\/&gt;<\/code> to re-render even if props passed down to it have not changed. <b>If parent re-renders, child re-renders<\/b>. To opt out of that, we, as developers who diligently memoize our code, should wrap <code>&lt;FilteredList\/&gt;<\/code>\u00a0in <code>React.memo()<\/code> API like so:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-53186 \" src=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-22-at-22.11.20.png\" alt=\"a screenshot of code editor that shows a component rendering list of filtered list elements\" width=\"795\" height=\"434\" srcset=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-22-at-22.11.20.png 912w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-22-at-22.11.20-300x164.png 300w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-22-at-22.11.20-768x419.png 768w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-22-at-22.11.20-400x218.png 400w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-22-at-22.11.20-360x197.png 360w\" sizes=\"auto, (max-width: 795px) 100vw, 795px\" \/><\/p>\n<p>In this small example, it seems like it did not take a lot of time to use manual memoization and optimize the performance of the code. Yet, using a rich imagination, you can envision a real-life application with tons of components, which need to be considered and memoized. Things can get messy quickly, readability is a bit lost and, frankly, this is when you start losing a lot of the value of React.<\/p>\n<p>Apart from that, it is not an easy and intuitive job to memoize things properly in React. Before using memoization hooks, one should consider composition techniques such as \u201c<a href=\"https:\/\/javascript.plainenglish.io\/lift-state-up-or-push-state-down-in-react-2b592cc5dbaf\">moving state down<\/a>\u201c or \u201c<a href=\"https:\/\/www.netlify.com\/blog\/2020\/12\/17\/react-children-the-misunderstood-prop\/\">passing components as children<\/a>\u201c.<\/p>\n<p>Now, picture this: we can effortlessly write straightforward code similar to our very first example, while completely disregarding the memoization and the previously discussed design patterns. This is precisely the capability that the React Compiler will enable developers to do. No more unreadable and untrackable chains of props inside <code>useMemo<\/code> and <code>useCallback<\/code>. No more unnoticed children, which have been forgotten to be memoized. Writing code becomes easier and more intuitive. The code itself will remain very simple and procedural, and the output is going to be performant and optimized.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"React-19-features\"><\/span>React 19 features<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>React Compiler is by far the most exciting part of the React Conf 2024, but it is not the only benefit we get. Several features that were previously exclusive to React Canary are now accessible in the React 19 RC version. Let&#8217;s explore these thrilling new features.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"use-API\"><\/span>use() API<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><code><a href=\"https:\/\/react.dev\/reference\/react\/use\">use() Client API<\/a><\/code> can be used to get the value of a <a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Reference\/Global_Objects\/Promise\">Promise<\/a> or a <a href=\"https:\/\/react.dev\/learn\/passing-data-deeply-with-context\">context<\/a>. In the case of context, it can replace <code>useContext<\/code> hook. Yes, we will be able to write 6 letters less than before! The more exciting part is, however, resolving a promise like, for example, when fetching data from an API. It does not have to be packed in <code>useEffect<\/code> when performed on a client side. The following code example shows how fetching data can be performed utilizing the <code>use()<\/code> API.<\/p>\n<p>Let&#8217;s first have a look at how we would write it with a good old <code>useEffect<\/code> hook. Component fetches some posts on initial render, shows \u201cLoading \u2026\u201c while the data is being fetched and, after getting response from an API, renders the data:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-53188 \" src=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.14.25.png\" alt=\"code screenshot showing the component which fetches data from dummy api and renders it on a screen\" width=\"579\" height=\"607\" srcset=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.14.25.png 1074w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.14.25-286x300.png 286w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.14.25-977x1024.png 977w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.14.25-768x805.png 768w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.14.25-400x419.png 400w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.14.25-360x377.png 360w\" sizes=\"auto, (max-width: 579px) 100vw, 579px\" \/><\/p>\n<p>And this is how it will look after applying the <code>use()<\/code>. In this case, there is no need to await a response, since <code>use()<\/code> returns the resolved value of a Promise. Additionally, it enables using <a href=\"https:\/\/react.dev\/reference\/react\/Suspense\">Suspense<\/a> and <a href=\"https:\/\/react.dev\/reference\/react\/Component#catching-rendering-errors-with-an-error-boundary\">error boundaries<\/a> to, for example, show fallback as in this example:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-53190 \" src=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.27.46.png\" alt=\"example of React code that shows fetching data with use() Hook\" width=\"787\" height=\"433\" srcset=\"https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.27.46.png 1090w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.27.46-300x165.png 300w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.27.46-1024x564.png 1024w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.27.46-768x423.png 768w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.27.46-400x220.png 400w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.27.46-528x290.png 528w, https:\/\/www.inovex.de\/wp-content\/uploads\/Screenshot-2024-04-23-at-10.27.46-360x198.png 360w\" sizes=\"auto, (max-width: 787px) 100vw, 787px\" \/><\/p>\n<p>As you can see, the code is much leaner and more readable in this case. With <code>use()<\/code> API, developers do not have to waste time tracking different states and props. An excellent example of <em>Write Less, Do More<\/em><\/p>\n<h3><span class=\"ez-toc-section\" id=\"useOptimistic-Hook\"><\/span>useOptimistic() Hook<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><code><a href=\"https:\/\/react.dev\/reference\/react\/useOptimistic\">useOptimistic() Hook<\/a><\/code> allows us to show temporary UI while waiting for an asynchronous task to resolve in the background. This is especially useful when you want to show an \u201coptimistic\u201c result to a user while sending form data.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Directives\"><\/span>Directives<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><code><a href=\"https:\/\/react.dev\/reference\/react\/use-server\">'use server'<\/a><\/code> and <code><a href=\"https:\/\/react.dev\/reference\/react\/use-client\">'use client'<\/a><\/code> Directives will be now available for those who would like to explore the powers of <a href=\"https:\/\/react.dev\/blog\/2023\/03\/22\/react-labs-what-we-have-been-working-on-march-2023#react-server-components\">Server Components<\/a>, which, by the way, will be directly integrated into React with the upcoming release. It will offer numerous benefits such as:<\/p>\n<ul>\n<li><b>SEO<\/b> will be improved with server-rendered components, as they provide more accessible content to web crawlers<\/li>\n<li>There will be a <b>performance boost<\/b>, especially for content-heavy applications, with faster initial page loads and overall improved performance.<\/li>\n<li>Server components will allow for <b>code execution on the server,<\/b> making tasks such as API calls seamless and efficient.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Actions\"><\/span><b>Actions<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Another thrilling feature that will streamline and simplify form handling is <a href=\"https:\/\/react.dev\/reference\/react-dom\/components\/form\">actions<\/a>. Actions will essentially replace the <code>onSubmit<\/code> event handler with <code>action<\/code> attribute. The main benefit of an action attribute is that you will have direct access to form data in your action, which reduces the boilerplate code.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"useActionState-and-useFormStatus\"><\/span><b>useActionState() and useFormStatus()<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Related to the action attribute and most likely to be used together with it, are the hooks called <code><a href=\"https:\/\/react.dev\/reference\/react\/useActionState\">useActionState()<\/a><\/code> and <code><a href=\"https:\/\/react.dev\/reference\/react-dom\/hooks\/useFormStatus\">useFormStatus()<\/a><\/code>. The former allows you to update the state according to the outcome of a form action. The latter provides details regarding the form submission status, such as &#8218;pending&#8216; or &#8218;method&#8216;.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Asset-loading\"><\/span><b>Asset loading<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Normally, in React, the loading of assets has to be managed manually, especially when it comes to images and other files. Developers would have to add custom code to detect which assets are ready to be loaded to avoid inconsistent user experiences, such as flickering from a non-styled to a styled view. In React 19, the loading lifecycle of assets will be included in Suspense so that React will intelligently determine whether the content is ready to be displayed. Additionally, new <a href=\"https:\/\/react.dev\/reference\/react-dom#resource-preloading-apis\">Resource Loading APIs<\/a> will be available to offer more control over loading and initializing resources.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Document-metadata\"><\/span><b>Document metadata<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Built-in support for meta tags such as <code>&lt;title&gt;<\/code>, <code>&lt;meta&gt;<\/code>, and <code>&lt;link&gt;<\/code> is one more advantage that will be accessible with React 19. These elements are important for accessibility and SEO optimization. They will be supported in a fully client-side environment as well as in SSR and RSC. This improvement eliminates the requirement for using libraries such as React Helmet.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Web-components\"><\/span>Web components<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Integrating web components into React is not a simple process. Generally, you have to either convert the web component to a React component or install additional packages and write extra code to ensure compatibility with React. This can be quite challenging.<\/p>\n<p>Fortunately, React 19 is going to simplify the process of integrating web components. At this point, it is not clear how exactly the integration of web components will look like. Hopefully, it will make the development process more streamlined and will allow us to utilize the extensive range of pre-existing web components within your React applications.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"ref-as-a-regular-prop\"><\/span><b>ref as a regular prop<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>How many of us have wished for <code>ref<\/code> to be a simple prop? Well, now that wish has been granted, as <code>ref<\/code> will become a regular prop that can be passed down through a component tree. This simplifies the process and removes the complexity of implementing <code>forwardRef<\/code> wrappers.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Summary\"><\/span>Summary<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>React has an ambitious vision. React 19, in conjunction with the groundbreaking React Compiler, will transform our approach to web development. By focusing on streamlining code, improving performance, and introducing flexible features, the new release sets the stage for a smoother and more enjoyable development process.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Resources-and-Links\"><\/span>Resources and Links<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"mdx-heading mt-0 text-primary dark:text-primary-dark -mx-.5 break-words text-5xl font-display font-bold leading-tight\"><a href=\"https:\/\/react.dev\/blog\/2024\/02\/15\/react-labs-what-we-have-been-working-on-february-2024#react-compiler\">React Labs: What We&#8217;ve Been Working On \u2013 February 2024<\/a><\/p>\n<p class=\"mdx-heading mt-0 text-primary dark:text-primary-dark -mx-.5 break-words text-5xl font-display font-bold leading-tight\"><a href=\"https:\/\/react.dev\/blog\/2023\/03\/22\/react-labs-what-we-have-been-working-on-march-2023\">React Labs: What We&#8217;ve Been Working On \u2013 March 2023<\/a><\/p>\n<p><a href=\"https:\/\/react.dev\/learn\/react-compiler?ck_subscriber_id=2396127205\">React Compiler<\/a><\/p>\n<p><a href=\"https:\/\/react.dev\/blog\/2024\/04\/25\/react-19\">React 19 RC<\/a><\/p>\n<p><a href=\"https:\/\/react.dev\/reference\/react\">React Documentation<\/a><\/p>\n<p class=\"style-scope ytd-watch-metadata\"><a href=\"https:\/\/www.youtube.com\/watch?v=qOQClO3g8-Y&amp;t=464s\">Understanding Idiomatic React \u2013 Joe Savona, Mofei Zhang, React Advanced 2023<\/a><\/p>\n<p class=\"style-scope ytd-watch-metadata\"><a href=\"https:\/\/www.youtube.com\/watch?v=lGEMwh32soc&amp;t=19s\">React without memo<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The world of front-end development is constantly evolving, with new frameworks and libraries continuously emerging to expand the possibilities of web development. Amidst this dynamic landscape, React has established itself as a pivotal tool for modern web development, renowned for its user-friendly nature, adaptability, and high performance. The highly anticipated release of React 19 is [&hellip;]<\/p>\n","protected":false},"author":405,"featured_media":53850,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"ep_exclude_from_search":false,"footnotes":""},"tags":[339],"service":[444],"coauthors":[{"id":405,"display_name":"Aygul Okdirova","user_nicename":"aokdirova"}],"class_list":["post-53171","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-state-of-the-web","service-frontend"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>React 19 &amp; React Compiler: Elevating Developer Experience Without Compromising Performance - inovex GmbH<\/title>\n<meta name=\"description\" content=\"What are the new features in React 19? 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