RegExp \uhhhh Metacharacter
A global search for the hexadecimal number 0057 (W) in a string:
let text = "Visit W3Schools. Hello World!";
let pattern = /\u0057/g;
let result = text.match(pattern);
Try it Yourself »
Description
The \uhhhh metacharacters matches Unicode characters specified by a hexadecimal number (hhhh).
Syntax
new RegExp("\\uhhhh")
or simply:
/\uhhhh/
Syntax with modifiers
new RegExp("\\uhhhh", "g")
or simply:
/\uhhhh/g
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
/\uhhhh/ is an ECMAScript1 (JavaScript 1997) feature.
It is supported in all browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | Yes |
