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js下载网站中的canvas保存为图片 用处挺大的，毕竟很多生成网站都是生成canvas，懂得都懂function exportCanvasAsPNG(id, fileName) { var canvasElement = document.getElementById(id); var MIME_TYPE = "image/png"; var imgURL = canvasElement.toDataURL(MIME_TYPE); var dlLink = document.createElement('a'); dlLink.download = fileName; dlLink.href = imgURL; dlLink.dataset.downloadurl = [MIME_TYPE, dlLink.download, dlLink.href].join(':'); document.body.appendChild(dlLink); dlLink.click(); document.body.removeChild(dlLink); }直接通过jspath获取elementvar canvasElement = document.querySelector("#root > div > div > div > div > div.NewPatternView_preview__2qc3i > div > canvas"); var MIME_TYPE = "image/png"; var imgURL = canvasElement.toDataURL(MIME_TYPE); var dlLink = document.createElement('a'); dlLink.download = 'a.png'; dlLink.href = imgURL; dlLink.dataset.downloadurl = [MIME_TYPE, dlLink.download, dlLink.href].join(':'); document.body.appendChild(dlLink); dlLink.click(); document.body.removeChild(dlLink);
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