Javascript implementation fixed in the lower right corner to expand and contract the DIV layer _ javascript skills

This article mainly introduces how JavaScript can expand and contract the DIV layer in the lower right corner. the div layer in the lower right corner can be scaled and expanded, which is very useful, for more information about how to expand and contract the DIV layer in the lower right corner of JavaScript, see the example in this article. Share it with you for your reference. The specific implementation method is as follows:

The code is as follows:

JS implementation fixed in the lower right corner of the DIV layer that can be expanded and reduced

Only the core part is implemented. it should be nice to improve the content or continue to beautify it!

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