自行更换图片地址
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
#imgContainer {
background: rgba(255, 0, 0, 0.1);
}
</style>
</head>
<body>
<div class="container">
<p>鼠标滑轮滚动实现图片缩放</p>
<label for="rate">灵敏度 <input type="text" name="rate" id="rate">
</label>
<div id="imgContainer">
<img id="img" src="./dictory.png" alt="">
</div>
</div>
<script>
window.onload = function () {
const img = document.getElementById("img");
const imgContainer = document.getElementById("imgContainer");
const rateDom = document.getElementById("rate");
var rate = 5000;
rateDom.addEventListener('change', function (e) {
rate = e.target.value;
}, false);
const calc = (value) => 1 + value / (rate || 5000);
imgContainer.addEventListener("mousewheel", function (e) {
img.style.width = img.offsetWidth * calc(e.deltaY) + 'px'
e.preventDefault()
}, false);
}
</script>
</body>
</html>tips
如果还不清楚或者想交个朋友的同学可以微信联系我：qq981145483（备注:csdn）
