Application of the multiline attribute of JavaScript regular expressions

2020-06-15 07:36:11
OfStack

A multiline regular expression is a read-only Boolean property of an object. It specifies whether a particular regular expression matches multiple lines, that is, whether or not it is created using the "m" attribute.
grammar


RegExpObject.multiline

Here is the details of the parameters:

The return value:

Return "TRUE" if "m" modification is set, otherwise return "FALSE".

Example:


<html>
<head>
<title>JavaScript RegExp multiline Property</title>
</head>
<body>
<script type="text/javascript">
  var re = new RegExp( "string" );
  if ( re.multiline ){
   document.write("Test1-multiline property is set"); 
  }else{
   document.write("Test1-multiline property is not set"); 
  }
  re = new RegExp( "string", "m" );
  if ( re.multiline ){
   document.write("<br/>Test2-multiline property is set"); 
  }else{
   document.write("<br/>Test2-multiline property is not set"); 
  }
</script>
</body>
</html>

This will produce the following results:


Test1 - multiline property is not set
Test2 - multiline property is set