--- title: Lazy loading (and preloading) components in React 16.6 description: React 16.6 introduced React.lazy() and React.Suspense to simplify code splitting. Using a stock list/chart demo app, the post walks through converting a static... canonical: https://daily.dev/posts/lazy-loading-and-preloading-components-in-react-16-6-171jn2vzh twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Lazy loading (and preloading) components in React 16.6 | daily.dev og:description: React 16.6 introduced React.lazy() and React.Suspense to simplify code splitting. Using a stock list/chart demo app, the post walks through converting a static... og:url: https://daily.dev/posts/lazy-loading-and-preloading-components-in-react-16-6-171jn2vzh og:image: https://api.daily.dev/og/posts/171jN2vZH.png og:image:alt: Lazy loading (and preloading) components in React 16.6 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Lazy loading (and preloading) components in React 16.6 **[Rodrigo Pombo](https://daily.dev/sources/pomb)** · 6 min read · 0 upvotes · 0 comments ## Summary React 16.6 introduced React.lazy() and React.Suspense to simplify code splitting. Using a stock list/chart demo app, the post walks through converting a static import to a lazy-loaded component, reducing initial bundle size from 125KB to 36KB and cutting load time from 2470ms to 1546ms. It then covers two preloading strategies: triggering the dynamic import before React.lazy() so the chunk loads in the background, and pre-rendering the component hidden inside a Suspense boundary with a null fallback. Limitations of the hidden-div approach (portals, extra DOM nodes) are discussed, along with ideas for future improvements. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [I Reduced Our React Bundle by 70% Without Removing a Single Feature](https://daily.dev/posts/i-reduced-our-react-bundle-by-70-without-removing-a-single-feature-szhhzvcpd) · Medium · 18 upvotes · 3 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#react](https://daily.dev/tags/react), [#performance](https://daily.dev/tags/performance) [View this post on daily.dev](https://daily.dev/posts/lazy-loading-and-preloading-components-in-react-16-6-171jn2vzh) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Lazy loading (and preloading) components in React 16.6","url":"https://daily.dev/posts/lazy-loading-and-preloading-components-in-react-16-6-171jn2vzh","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/lazy-loading-and-preloading-components-in-react-16-6-171jn2vzh"},"datePublished":"2026-03-31T12:30:05.297Z","dateModified":"2026-03-31T12:39:56.948Z","description":"React 16.6 introduced React.lazy() and React.Suspense to simplify code splitting. 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