Next.js is a popular JavaScript framework for building server-rendered React applications. It allows developers to easily create highly performant and scalable web applications. When it comes to have a better user experience with great performance of your web application, using the lazy loading component is the most powerful technique that can load your page faster and engage users as much as they want to be.<\/p>\n
Lazy loading components in React<\/a> is a technique that allows you to only load a component when it is needed, which can improve the performance of your application. In Next.js, there are a few ways you can implement lazy loading on scroll to improve the user experience and reduce the amount of data that is loaded on initial page load.<\/p>\n One way to implement lazy loading on scroll is to use the Also read:\u00a0React vs Angular: Which One to Choose for Your Project<\/a><\/strong><\/p><\/blockquote>\n Another way to implement lazy loading on scroll is to use the Additionally, you can use the It’s important to note that while lazy loading can improve the performance of your application, it may not be necessary for all components. Lazy loading should only be used for components that take a long time to load or that are heavy on resources. Additionally, it’s better to use Intersection observer API rather than In below example how you can implement lazy loading on scroll using the the This example is just a basic example and you can customize it to fit your needs like adding loading spinner or fallback component while the component is not yet visible.<\/p>\nIntersectionObserver<\/code> API. This API allows you to observe a DOM element and determine when it is visible within the viewport. You can create a higher-order component (HOC) that wraps your component and uses the IntersectionObserver<\/code> API to check if it is in the viewport. Once the component enters the viewport, the HOC will set the component to be visible, and it will be rendered.<\/p>\nuseEffect<\/code> hook to check if the user has scrolled to a certain point on the page. You can create a component that wraps your component and uses the useEffect<\/code> hook to check the scroll position. Once the user scrolls to the specified point, the component will be set to be visible, and it will be rendered.<\/p>\nuseRef<\/code> hook to get a reference to a DOM element and then use the useEffect<\/code> hook to check if the element is in the viewport. This approach is similar to using the IntersectionObserver<\/code> API and it allows you to lazy-load elements based on whether they are visible in the viewport.<\/p>\nuseEffect<\/code> and useRef<\/code> as it could have performance issues if the component is heavy and the user scrolls frequently.<\/p>\nIntersectionObserver<\/code> API in Next.js:<\/p>\n\n
IntersectionObserver<\/code> API to check if it is in the viewport.<\/li>\n<\/ol>\n\r\nimport React, { useRef, useEffect } from 'react'\r\n\r\nconst withLazyLoad = (WrappedComponent) => {\r\n return ({ ...props }) => {\r\n const [isVisible, setIsVisible] = useState(false)\r\n const ref = useRef(null)\r\n\r\n useEffect(() => {\r\n const observer = new IntersectionObserver(\r\n ([entry]) => {\r\n if (entry.isIntersecting) {\r\n setIsVisible(true)\r\n observer.disconnect()\r\n }\r\n },\r\n { threshold: 0.5 }\r\n )\r\n observer.observe(ref.current)\r\n return () => observer.disconnect()\r\n }, [ref])\r\n\r\n return (\r\n \n
\r\nimport withLazyLoadfrom '.\/withLazyLoad';\r\nimport HeavyComponent from '.\/HeavyComponent';\r\nconst LazyHeavyComponent = withLazyLoad(HeavyComponent)\r\n\r\nconst MyPage = () => {\r\n return (\r\n HeavyComponent<\/code> will only be loaded when it is visible in the viewport, regardless of the scroll position. By using the IntersectionObserver<\/code> API, you can improve the performance of your application<\/a> and provide a better user experience.<\/p>\nConclusion<\/strong><\/span><\/h3>\n