Uncaught TypeError: Failed to execute 'readAsDataURL' on 'FileReader': parameter 1 is not of type 'Blob'. How do I fetch the preview of an image?

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逝去的感伤
逝去的感伤 2021-01-06 10:30

I am trying to get the preview of the file uploaded. My scripts are as follows:

current.html:

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