source Property (Regular Expression) (JavaScript)


Returns a copy of the text of the regular expression pattern. Read-only. The rgExp argument is a Regular expression object. It can be a variable name or a literal.



The following example illustrates the use of the source property:

function SourceDemo(re, s){
   var s1;
   // Test string for existence of regular expression.
   if (re.test(s))
      s1 = " contains ";
      s1 = " does not contain ";
   // Get the text of the regular expression itself.
   return(s + s1 + re.source);


Supported in the following document modes: Quirks, Internet Explorer 6 standards, Internet Explorer 7 standards, Internet Explorer 8 standards, Internet Explorer 9 standards, Internet Explorer 10 standards, Internet Explorer 11 standards. Also supported in Store apps (Windows 8 and Windows Phone 8.1). See Version Information.

Applies To: Regular Expression Object (JavaScript)