Wrap images in a long page so they only load as users scroll down, reducing initial page load time.
Lazy-load heavy React components like charts or maps so they don't slow down the first render.
Improve performance of a React app with lots of media by using throttled scroll detection to control when content loads.
"react-lazyload" is a JavaScript library for React applications that delays loading components, images, and other content until they appear in the visible area of the screen. The core idea is simple: if a user never scrolls down to see a particular part of the page, there is no need to load that content right away. Waiting until it is actually visible reduces the amount of work the browser does on initial page load, which speeds up the experience. You use it by wrapping whatever you want to lazy-load inside a LazyLoad tag in your React code. Until the wrapped item scrolls into view, a placeholder takes its spot. Once visible, the real component or image loads and replaces the placeholder. You can set an offset to start loading slightly before the element reaches the viewport, which prevents users from noticing any delay as they scroll. The library offers two loading modes: a one-time load (where the component loads once and is never unloaded) and a continuous load (where components can be unmounted again when they scroll out of view). You can also control how the scroll detection behaves, using either throttle or debounce settings to avoid performance issues from too many rapid scroll events. Listening to resize events is supported but off by default. A version 3.0 update changed how the library attaches to DOM elements, introducing an extra wrapper div around lazy-loaded items. The README notes this could break layouts or automated snapshot tests depending on how the app was built, and explains how to customize the styling of that wrapper. The project is written in JavaScript and installable via npm. Only one child element is allowed inside each LazyLoad wrapper. Maintenance has transferred to a new contributor as noted at the top of the README.
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