RegExp.input ($_)
Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
The non-standard input
property is a static property of regular expressions that contains the string against which a regular expression is matched. RegExp.$_
is an alias for this property.
Syntax
<var>RegExp</var>.input RegExp.$_
Description
The input
property is static, it is not a property of an individual regular expression object. Instead, you always use it as RegExp.input
or RegExp.$_.
The value of the input
property is modified whenever the searched string on the regular expression is changed and that string is matching.
Examples
Using input
and $_
var re = /hi/g; re.test("hi there!"); RegExp.input; // "hi there!" re.test("foo"); // new test, non-matching RegExp.$_; // "hi there!" re.test("hi world!"); // new test, matching RegExp.$_; // "hi world!"
Specifications
Non-standard. Not part of any current specification.
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
See also
-
RegExp.lastMatch ($&)
-
RegExp.lastParen ($+)
-
RegExp.leftContext ($`)
-
RegExp.rightContext ($')
-
RegExp.$1-$9
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/javascript/reference/global_objects/regexp/input