The 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.
RegExp.prototype.source
Try it
Property attributes of RegExp.prototype.source |
|
|---|---|
| Writable | no |
| Enumerable | no |
| Configurable | yes |
Examples
Using source
var regex = /fooBar/ig; console.log(regex.source); // "fooBar", doesn't contain /.../ and "ig".
Empty regular expressions and escaping
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
Specifications
Browser compatibility
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | Deno | Node.js | |
source |
1
|
12
|
1
|
4
|
5
|
1
|
1
|
18
|
4
|
10.1
|
1
|
1.0
|
1.0
|
0.10.0
|
empty_regex_string |
6
|
12
|
38
|
No
|
15
|
5
|
≤37
|
18
|
38
|
14
|
4.2
|
1.0
|
1.0
|
0.10.0
|
escaping |
73
|
12
|
38
|
10
|
60
|
6
|
73
|
73
|
38
|
52
|
6
|
11.0
|
1.0
|
12.0.0
|
prototype_accessor |
48
|
12
|
41
|
4
|
35
|
1.3
|
48
|
48
|
41
|
35
|
1
|
5.0
|
1.0
|
6.0.0
|
See also
© 2005–2022 MDN 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/source
