Use JS to highlight search keywords and implement code

Use JS to highlight the specified keyword in the article content

Yes ..

These keywords: beauty, life, and shopping
When these keywords appear in the article, highlight them ..

The article generates static pages, and these keywords can be updated at any time, so I want to use JS to implement it...
I don't know how to implement this function? Here for help

Copy codeThe Code is as follows:
<Script language = "JavaScript">
Function highlight (key ){
Var key = key. split ('| ');
For (var I = 0; I <key. length; I ++ ){
Var rng = document. body. createTextRange ();
While (rng. findText (key [I])
// Rng. pasteHTML (rng. text. fontcolor ('red '));
Rng. pasteHTML ('<div style = "border: 1 solid red; display: inline"> <a href = "#" title = "+ rng. text + "> '+ rng. text + '</a> </div> ');
}
}
Highlight ('Article | key | function ')
</Script>