How to remove spaces on both sides of a string in nodejs

In nodejs, you can use the replace method and regular expressions to remove spaces on both sides of a string. The syntax is "str.replace(/(^\s*)|(\s*$)/g, " ");" The replace() method is used to replace characters in a string, or to replace a substring that matches a regular expression.

The operating environment of this tutorial: windows10 system, nodejs version 12.19.0, DELL G3 computer.

How to remove spaces on both sides of a string in nodejs

To remove spaces on the left and right ends of a string, you can easily use trim, ltrim or rtrim, but there are no these three built-in methods in js and need to be written manually. The following implementation method uses regular expressions, which is very efficient, and adds these three methods to the built-in methods of the String object.

The method format written as a class is as follows: (str.trim();)

 　　写成函数可以这样：(trim(str)) 　　

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