Detailed explanation of match and replace examples of strings in JavaScript

This article mainly introduces the match and replace methods of strings in JavaScript. It has a good reference value and I hope it will be helpful to everyone. Let’s follow the editor to take a look, I hope it can help everyone.

1. Match method

The match() method can retrieve a specified value within a string, or find a match for one or more regular expressions.

The return value of the match() method is: an array storing the matching results.

2. Replace method

The replace() method is used to replace some characters with other characters in a string, or replace a substring that matches a regular expression.

The return value of the replace method is: a new string.

3. Description

The parameters of the above two methods mainly add global g when using regular expressions, so that all strings can be matched or replaced.

Sample code:

nbsp;html>


 
  <meta>
  <title>JavaScript中字符串的match与replace方法</title>
 

 
  <!--注意src路径要对-->
  <script></script>
  <script>
   var str = "1 plus 2 equal 3";
   //match方法返回值为数组
   var arr = str.match(/[0-9]/g)
   console.log(arr);

   var new_str = str.replace(/[0-9]/g, &#39;newstr&#39;);
   //replace方法返回值为新的字符串
   console.log(new_str)
  </script>
 

The console output is:

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