How to bind canvas to transparent area in png image?

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Doctor Bi2019-01-21 14:53:34

JavaScript

Doctor Bi, 2019-01-21 14:53:34

Good afternoon!
Is it possible to bind the transparent area in some way, for example canvas
Purpose: I want to display the image uploaded by the user there, and the problem is that the size of the figure can change at different resolutions

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