RegExp Group Modifiers
Example
A case insenisitive search for "W3Schools tutorials":
let text = "W3Schools Tutorials.";
const pattern = /(?i:W3Schools) tutorials/i;
let result = text.match(pattern);
Try it Yourself »
Explained
The i flag is only enabled for the W3Schools part of the pattern. The tutorial part is case-sensitive.
Syntax
new RegExp("(?flags:x)y")
or simply:
/(?flags:pattern)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
/(?flags: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 |
