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Detailed explanation of the use of ignoreCase attribute in JavaScript regular expressions_Basic knowledge

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2016-05-16 15:54:541478browse

ignoreCase is a read-only Boolean property of the regular expression object. It specifies whether a specific regular expression performs case-insensitive matching. , which is created with the "i" attribute.
Grammar

RegExpObject.ignoreCase

Here are the details of the parameters:

  • NA

Return value:

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

Example: 

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

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

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

This will produce the following results: 

Test1 - ignoreCase property is not set
Test2 - ignoreCase property is set

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