第694天 写一个鼠标滚动图片时放大或缩小图片 作者：haizhilin [3+1官网](http://www.h-camel.com/index.html) [我也要出题](http://www.h-camel.com/contribution.html)
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LoveEocding commentedon Mar 10, 2021
const Img = document.getElementById('img');
Img.addEventListener('mousewheel', function (e) {
if (e.deltaY > 0) {
a = a + 0.2 > 5 ? 5 : a + 0.2;
e.target.style.transform =
scale(${a});} else {
a = a - 0.1 < 0.2 ? 0.2 : a - 0.1;
e.target.style.transform =
scale(${a});}
})