html5 canvas 加载图片错误 SecurityError: Failed to execute 'toDataURL' on 'HTMLCanvasElement'
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html5 canvas 加载图片错误 SecurityError: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported
原因:跨域加载图片
解决方案:
javascript :
server 返回的http response中要加以下值到header:
原因:跨域加载图片
解决方案:
javascript :
<img src="your_domain.com/img.png" crossorigin="Anonymous" />
<script> var image = new Image(); image.crossOrigin = "Anonymous"; ...</script>
server 返回的http response中要加以下值到header:
Access-Control-Allow-Origin "*"
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