js怎么打图片转换二进制

1、functionconvertImgToBase64(url,callback,outputFormat){varcanvas租涫疼迟=document.createElement('CANVAS'),

3、img.crossOrigin='Anonymous';img.onload=function(){canvas.height=img.height;

5、vardataURL=canvas.toDataURL(outputFormat||'image/png');callback.call(this,dataURL);