page cannot request a picture again after loading a picture, but the picture needs to be read out by script. When canvas changes to base64, you still need to set up the picture img.src to request the picture again, so is there any other way that this method doesn"t work
img.onload=function () {canvas drawing to base64}
img.src='xxxx'
Thank you for following the situation. Some special needs can not be written js implementation has been solved through screenshot
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