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How to use insertBefore in javascript
In JavaScript, the insertBefore() method is used to insert a new node in the DOM tree. This method requires two parameters: the new node to be inserted and the reference node (that is, the node where the new node will be inserted). If you want to know more about insertBefore, you can read the article below this topic.
How to use replace function in javascriptThere are two replace functions in js. One is location.replace(url), which jumps to a new url. The other is string.replace("xx", "yy"), which replaces the string and returns a new string. This method also The string itself is not changed. This article will introduce you to the replace function in javascript.
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