html2canvas网页截图

<script src="https://cdn.bootcdn.net/ajax/libs/html2canvas/1.4.1/html2canvas.min.js"></script>

new html2canvas(document.getElementById('js_content'), {

allowTaint:true,

    useCORS:true,

    width:$("#js_content").width(),

    height:$("#js_content").width()*0.7

}).then(canvas => {

html2canvas_img = canvas.toDataURL();

});