RegExp Capturing Groups (x)
Example
let text = "Haha, haha, haha.";
const pattern = /(haha)+/;
let result = text.match(pattern);
Try it Yourself »
Explained
- (haha) captures a group of characters
- (haha)+ matches zero or more occurences of the group
- text.match() returns an array of results
- match.groups() returns an Array of matches
Syntax
new RegExp("(x)")
or simply:
/(x)/
Regular Expression Methods
Regular Expression Search and Replace can be done with different methods.
These are the most common:
String Methods
| Method | Description |
|---|---|
| match(regex) | Returns an Array of results |
| matchAll(regex) | Returns an Iterator of results |
| replace(regex) | Returns a new String |
| replaceAll(regex) | Returns a new String |
| search(regex) | Returns the index of the first match |
| split(regex) | Returns an Array of results |
RegExp Methods
| Method | Description |
|---|---|
| regex.exec() | Returns an Iterator of results |
| regex.test() | Returns true or false |
Browser Support
/(x)/ is an ECMAScript1 (JavaScript 1997) feature.
It is supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | Yes |
