How to make preview default continuous scroll

HOW TO MAKE PREVIEW DEFAULT CONTINUOUS SCROLL HOW TO

card-img-top on the page with document.querySelectorAll.

In the following useEffect hook, we grab all the images with a class of. As with the scrollObserver function, we wrap imgObserver in a useCallback hook to prevent un-ending component re-render.ДЄlso note that we stop observing an img element once weвЂ™re done with the substitution. Notice that we first check if the new image source exists before doing the swap. When the page hits an intersection, as determined by en.intersectionRatio > 0, we swap the image source on the element. Var intObserver = new IntersectionObserver(entries =>, ) ДЄs with scrollObserver, we define a function, imgObserver, which accepts a node to observe. With that you can be able to implement infinite scroll and image lazy loading in your React application where necessary. We would also have learned a few more things about React Hooks. Our goal is that at the end of this article, we will have implemented infinite scroll and image lazy loading using a native HTML API.

Some familiarity with React hooks will be beneficial but not required, as we will be taking a look at a few. The reader should possess a working knowledge of React functional components. In this article, weвЂ™re going to explore some use cases for the Intersection Observer API in the context of a React functional component. If you have been looking for an alternative to pagination, infinite scroll is a good consideration.

HOW TO MAKE PREVIEW DEFAULT CONTINUOUS SCROLL HOW TO

In the process, weвЂ™ll learn how to use some of ReactвЂ™s hooks and how to create Custom Hooks. In this tutorial, weвЂ™re going to learn how to use the HTML Intersection Observer API to implement infinite scrolling and image lazy loading in a React functional component.

How to make preview default continuous scroll