js报错 Uncaught DOMException: Failed to execute ‘getImageData‘ on ‘CanvasRenderingContext2D‘: The can
js报错 Uncaught DOMException: Failed to execute ‘getImageData’ on ‘CanvasRenderingContext2D’: The canvas has been tainted by cross-origin data.在用IDEA时，调用getImageData()报跨域的错误，原因是图片存储在本地时，是默认没有域名的，用getImageData方法时，浏览器会判定为跨域而报错。搜索了很多方法尝试解决，包括：设置时间戳var img
