About match and replace methods in JavaScript (detailed tutorial)-JS Tutorial-php.cn

About match and replace methods in JavaScript (detailed tutorial)

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Release： 2018-06-22 17:52:59

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The editor below will introduce to you 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.

1. Match method

The match() method can retrieve the specified value within the 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

Thereplace() method is used to replace some characters with other characters in a string, or replace an The substring matched by the 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 the string can be processed Match or replace all.

Sample code:

<!DOCTYPE html>
<html lang="zh">

 <head>
  <meta charset="UTF-8" />
  <title>JavaScript中字符串的match与replace方法</title>
 </head>

 <body>
  <!--注意src路径要对-->
  <script src="js/jquery-1.12.4.min.js" type="text/javascript" charset="utf-8"></script>
  <script type="text/javascript">
   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>
 </body>

</html>

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The console output is:

The above is I compiled it for everyone, I hope it will be helpful to everyone in the future.

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