【JQ】点击图片放大缩小（等比例放大）

图片放大缩小demo

①文件路径

②enlarge.html

③enlarge.js

$(function(){
    imgenlarge('Img')
})
function imgenlarge(val){
    var flag=true
    var img = document.getElementById(val)
    console.log("imgbyid",img)
    img.onclick=function(){
        var imgH = img.height
        var imgW = img.width
        if(flag){
            flag=false
            img.height = imgH*2
            img.width = imgW*2
        }else{
            flag=true
            img.height = imgH/2
            img.width = imgW/2
        }
    }
}