How to implement react to return to the top

React implements the method of returning to the top: 1. Create a functional component "ScrollDemo.js"; 2. Create a button and pass the code "function handleScroll(){document.body.scrollTop = document.documentElement .scrollTop = 0;}" to achieve the effect of returning to the top.

The operating environment of this tutorial: Windows 10 system, react18.0.0 version, Dell G3 computer.

How to return to the top in react?

Knowledge preparation:

scrollTop represents the number of pixels hidden above the content area. When the element is not scrolled, scrollTop is 0. If the element scrolls vertically, the value of scrollTop increases

Target effect:

If you want to click the "Back to Top" button to return to the place where scrollTop is 0, you can also It's the top.

Let’s create a functional component ScrollDemo.js. And write the key code inside, a button, which calls the HandleScroll method when clicked. Fixed positioning for button

<button
                onClick={handleScroll}
                style={{
                    position: &#39;fixed&#39;,
                    top: &#39;320px&#39;,
                    right: &#39;0&#39;,
                    width: &#39;50px&#39;,
                    height: &#39;50px&#39;,
                    zIndex:&#39;3&#39;,
                    backgroundImage: &#39;linear-gradient(to top, #fad0c4 0%, #fad0c4 1%, #ffd1ff 100%)&#39;,
                    border:&#39;0&#39;,
                    transition:&#39;all 1s&#39;
            }}>回到顶部</button>
function handleScroll(){
        document.body.scrollTop = document.documentElement.scrollTop = 0;
    }

Recommended learning: "react video tutorial"

The above is the detailed content of How to implement react to return to the top. For more information, please follow other related articles on the PHP Chinese website!