使用外部库生成的图像，如何复制到剪切板中

Anki Help
1

我在anki 中引入了如下库：
https://cdnjs.cloudflare.com/ajax/libs/html2canvas/1.4.1/html2canvas.min.js

使用如下代码将元素转化为图像，并且顺利的将图像插入到了文档中，我想问，如何将生成的图像复制到剪切板中。

$(document).on('click', '#'+sanitizedTitle+index+'_hoverDiv'+' .biaozhuXuanGua', function(e) {
  var targetElement = $('#' + sanitizedTitle + index + '_hoverDiv');
  html2canvas(targetElement.get(0),{
	    backgroundColor: null,
	    imageTimeout:0,
        scale: window.devicePixelRatio
	}).then(canvas => {
    		document.body.appendChild(canvas);
	}).catch(error => {
    		alert('Error generating canvas:'+error);
  });
});
2

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