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Editor to share with you how canvas intercepts fillet pictures, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

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Because my usage scenario is simple, record the exception information, and the exception page is defined by myself, then html2canvas is sufficient.

The purpose of using html2canvas for the first time is to take a screenshot of the whole page and generate a picture for the user to save.

Let's first take a look at what HTML rendered looks like.

The image rendered by HTML can see that the above image has a fillet effect, but when I use html2canvas to convert the image, I found that the image fillet effect is not invalid.

Turned into something like this. After thinking about a lot of solutions, I decided to make the back fillet into a background picture, the background of the middle circle is transparent, and then cover it to the original image through absolute positioning, which is equivalent to a mask effect.

Of course, the DOM node of the mask image must be below the fillet image, similar to

If it is generated, it will be normal.

The code is as follows:

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