<body>
<div class="card-bg">
</div>
</body>
$(function() {
var canvas2 = document.createElement("canvas");
let _canvas = document.querySelector('.card-bg');//需要替换成图片的html区域
//获取宽高
var w = parseInt(window.getComputedStyle(_canvas).width);
var h = parseInt(window.getComputedStyle(_canvas).height);
//将canvas画布放大若干倍,然后盛放在较小的容器内,就显得不模糊了
canvas2.width = w * 2;
canvas2.height = h * 2;
canvas2.style.width = w + "px";
canvas2.style.height = h + "px";
//可以按照自己的需求,对context的参数修改,translate指的是偏移量
// var context = canvas.getContext("2d");
// context.translate(0,0);
var context = canvas2.getContext("2d");
context.scale(1.85, 1.7);
html2canvas(_canvas,{canvas:canvas2}).then(function(canvas) {
var imgUri = canvas.toDataURL("image/png").replace("image/png", "image/octet-stream"); // 获取生成的图片的url
$(".card-bg").html('<img class="down" src="'+imgUri+'" >');
})
});
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