new image,然后在onload中获取,示例代码如下:
<script type="text/javascript">
const img = new Image();
img.src = "//repo.bfw.wiki/bfwrepo/image/5d6539385ad28.png";
img.crossOrigin = 'anonymous';
img.onload = function (e) {
console.log(img.width);
console.log(img.height);
};
</script>
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