Try it on this page.

兴趣使然。
I make this page for fun.

• To switch css file dynamically, I use a <base href="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/"> tag in the head, which leads to some mess when running the page in local, I suggest add ".." before "/" to solve it.

• Additionally, Microsoft Edge seems not to support a local file page use localStorage API, so change to use Chrome or Firefox.

• I use uncss to shrink bootstrap's size, however, some class dynamically binded by vue cannot be detected, so remember to add theme back to bootstrap.min.uncss.css.