search

Home >Web Front-end >JS Tutorial >Detailed explanation of the use of global attributes in JavaScript regular expressions_Basic knowledge

Detailed explanation of the use of global attributes in JavaScript regular expressions_Basic knowledge

WBOY
WBOYOriginal
2016-05-16 15:54:571472browse

global is a read-only Boolean property of the regular expression object. It specifies whether a specific regular expression is matched globally. Otherwise it is created using the "g" attribute.
Grammar

RegExpObject.global

Here are the details of the parameters:

  • NA

Return value:

  • Returns "TRUE" if the "g" modification is set, otherwise returns "FALSE".

Example: 

<html>
<head>
<title>JavaScript RegExp global Property</title>
</head>
<body>
<script type="text/javascript">
  var re = new RegExp( "string" );

  if ( re.global ){
   document.write("Test1 - Global property is set"); 
  }else{
   document.write("Test1 - Global property is not set"); 
  }
  re = new RegExp( "string", "g" );

  if ( re.global ){
   document.write("<br />Test2 - Global property is set"); 
  }else{
   document.write("<br />Test2 - Global property is not set"); 
  }
</script>
</body>
</html>

This will produce the following results: 

Test1 - Global property is not set
Test2 - Global property is set

Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：Math.random() method for generating random numbers in JavaScript_Basic knowledgeNext article：Math.random() method for generating random numbers in JavaScript_Basic knowledge

Related articles

See more