How to use js to click the button to realize the cyclic switching of multiple pictures

This article introduces the knowledge of "how to use js to click buttons to achieve multiple picture cycle switching". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The details are as follows

Code:

Click the button to switch multiple images in a loop * {margin: 0; padding: 0;} .img-wrapper {width: 520px; height: 520px; background-size: contain; overflow: hidden Margin: 50px auto; background-color: green;}. Img-wrapper img {width: 533px; height: 300px;} .img-wrapper p {text-align: center; height: 20px; line-height: 20px Font-size: 16px; margin-bottom: 10px; margin-top: 8px;}. Img-wrapper button {margin: 12px 93px; font-size: 18px } _ window.onload = function () {let prev = document.getElementById ("prev"); let next = document.getElementById ("next"); let img = document.getElementsByTagName ("img") [0]; let info = document.getElementById ("info") / / create an array of paths to store photos let imgArr = ["img/111.jpg", "img/222.jpg", "img/333.jpg", "img/444.jpg", "img/555.jpg", "img/666.jpg"]; let index = 0 Info.innerText = "Total" + imgArr.length + "photos, now" + (index + 1) + "Zhang"; prev.onclick = function () {index--; prev.style.backgroundColor= "# ff4c31"; if (index

< 0) { index = imgArr.length - 1; } img.src = imgArr[index]; info.innerText = "一共有" + imgArr.length + "张照片，现在是第" + (index + 1) + "张"; }; next.onclick = function () { index++; next.style.backgroundColor="#ff4c31"; if (index >

ImgArr.length-1) {index = 0;} img.src = imgArr [index]; info.innerText = "altogether" + imgArr.length + "photo", now "+ (index + 1) +" Zhang;};}

The previous one, the next one.

Effect:

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