source property returns a
String containing the source text of the regexp object, and it doesn't contain the two forward slashes on both sides and any flags.
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|Property attributes of
var regex = /fooBar/ig; console.log(regex.source); // "fooBar", doesn't contain /.../ and "ig".
Starting with ECMAScript 5, the
source property no longer returns an empty string for empty regular expressions. Instead, the string
(?:) is returned. In addition, line terminators (such as "\n") are escaped now.
new RegExp().source; // "(?:)" new RegExp('\n').source === '\n'; // true, prior to ES5 new RegExp('\n').source === '\\n'; // true, starting with ES5
The definition of 'RegExp.prototype.source' in that specification.
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