npm安装
cnpm install --save html2canvas
import html2canvas from 'html2canvas';
var ss = document.querySelector('')
html2canvas(ss).then(function (canvas) {
// document.body.appendChild(canvas);
console.log("canvas", canvas)
var imgData = canvas.toDataURL("image/png").replace("image/png", "image/octet-stream");
let $a = document.createElement('a');
$a.setAttribute('href', imgData);
$a.setAttribute('download', 'test222.png');
let fileLink = document.createElement('span');
fileLink.setAttribute('style', 'cursor: pointer; -webkit-tap-highlight-color: transparent');
$a.appendChild(fileLink);
let body = document.getElementsByTagName('body')[0];
body.appendChild($a);
fileLink.click();
body.removeChild($a);
});
