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What this article shares with you is about how nodejs removes the spaces on both sides of the string. The editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

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 *) | (\ swords $) / g,"); the replace () method is used to replace characters in a string, or to replace a substring that matches a regular expression.

This tutorial operating environment: windows10 system, nodejs version 12.19.0, DELL G3 computer.

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

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

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

String.prototype.trim=function () {return this.replace (/ (^\ s*) | (\ return this.replace $) / g, ");} String.prototype.ltrim=function () {return this.replace (/ (^\ s*) / g,");} String.prototype.rtrim=function () {return this.replace (/ (\ s *) / g, "") } you can write a function like this: (trim (str)) function trim (str) {/ / delete the space return str.replace (/ (^\ s *)) at the left and right ends | (\ s *) / g, ");} function ltrim (str) {/ delete the space on the left side return str.replace (/ (^\ s*) / g,") } function rtrim (str) {/ / delete the space on the right return str.replace (/ (\ sprinter $) / g, "");} above is how nodejs removes the spaces on both sides of the string. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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