JS code to implement static page search and highlighting

This article mainly introduces JS to implement static page search and highlighting functions, involving javascript event response, character traversal replacement and dynamic transformation of page element attributes and other related operating techniques. Friends who need it can refer to it. I hope it can help everyone. .

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这是主体内容，有很多内容，很多很多啊啊啊……，比如1234abcd啊啊啊啊
这是主体内容，有很多内容，很多很多啊啊啊……，比如1234abcd啊啊啊啊
这是主体内容，有很多内容，很多很多啊啊啊……，比如1234abcd啊啊啊啊
这是主体内容，有很多内容，很多很多啊啊啊……，比如1234abcd啊啊< d d>啊啊

The running effect is as follows:

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