RegExp.rightContext ($')

The non-standard rightContext property is a static and read-only property of regular expressions that contains the substring following the most recent match. RegExp.$' is an alias for this property.

The rightContext property is static, it is not a property of an individual regular expression object. Instead, you always use it as RegExp.rightContext or RegExp["$'"].

The value of the rightContext property is read-only and modified whenever a successful match is made.

You can not use the shorthand alias with the dot property accessor (RegExp.$'), because the parser expects a starting string in that case and a SyntaxError is thrown. Use the bracket notation for property access.

var re = /hello/g;
re.test('hello world!');
RegExp.rightContext; // " world!"
RegExp["$'"];       // " world!"

• RegExp.input ($_)
• RegExp.lastMatch ($&)
• RegExp.lastParen ($+)
• RegExp.leftContext ($`)
• RegExp.$1-$9