Example of ajax implementation of uploading images, saving them to the background and reading them (graphic tutorial)

Below I will share with you an example of ajax implementation of uploading images, saving them to the background and reading them. It has a good reference value and I hope it will be helpful to everyone.

There are two ways to upload pictures:

1.fileReader can parse the picture into base64 code format, simple and crude

2.canvas You can redraw a picture. You can first put the blob of the obtained picture into the canvas, then generate the picture with width, height and transparency, and then convert it into the corresponding type and send it to the background. Currently, png and jpeg are supported. Format.

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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