2024-05-06 20:40:05 +00:00
|
|
|
|
---
|
2024-10-30 17:34:11 +00:00
|
|
|
|
date: 2020-11-06
|
2024-05-06 20:40:05 +00:00
|
|
|
|
id: 5441479c-12e5-48c1-ab17-46a9c3df8bc3
|
|
|
|
|
|
title: JavaScript RegExp Unicode Property Escapes
|
|
|
|
|
|
---
|
|
|
|
|
|
|
|
|
|
|
|
# Description
|
|
|
|
|
|
|
|
|
|
|
|
Characters can be matched by mentioning their Unicode character
|
|
|
|
|
|
properties inside of `\p{}`:
|
|
|
|
|
|
|
|
|
|
|
|
# Proposal
|
|
|
|
|
|
|
|
|
|
|
|
RegExp Unicode Property Escapes[^1]
|
|
|
|
|
|
|
|
|
|
|
|
# Syntax
|
|
|
|
|
|
|
|
|
|
|
|
``` javascript
|
|
|
|
|
|
console.log(/^\p{White_Space}+$/u.test("\t \n\r")); // true
|
|
|
|
|
|
console.log(/^\p{Script=Greek}+$/u.test("μετά")); // true
|
|
|
|
|
|
```
|
|
|
|
|
|
|
|
|
|
|
|
# Properties
|
|
|
|
|
|
|
|
|
|
|
|
## Examples
|
|
|
|
|
|
|
|
|
|
|
|
### Name
|
|
|
|
|
|
|
|
|
|
|
|
A unique name, composed of uppercase letters, digits, hyphens and
|
|
|
|
|
|
spaces.
|
|
|
|
|
|
|
|
|
|
|
|
- A: Name = LATIN CAPITAL LETTER A
|
|
|
|
|
|
- 🙂: Name = SLIGHTLY SMILING FACE
|
|
|
|
|
|
|
|
|
|
|
|
### General~Category~
|
|
|
|
|
|
|
|
|
|
|
|
categorizes characters
|
|
|
|
|
|
|
|
|
|
|
|
- x: General~Category~ = Lowercase~Letter~
|
|
|
|
|
|
- \$: General~Category~ = Currency~Symbol~
|
|
|
|
|
|
|
|
|
|
|
|
### White~Scpace~
|
|
|
|
|
|
|
|
|
|
|
|
Used for marking invisible spacing characters, such as spaces, tabs and
|
|
|
|
|
|
newlines.
|
|
|
|
|
|
|
|
|
|
|
|
- :͡ White~Space~ = True
|
|
|
|
|
|
- π: White~Space~ = False
|
|
|
|
|
|
|
|
|
|
|
|
### Age
|
|
|
|
|
|
|
|
|
|
|
|
Version of the Unicode Standard in which a character was introduced. For
|
|
|
|
|
|
example: The Euro sign € was added in version 2.1 of the Unicode
|
|
|
|
|
|
standard.
|
|
|
|
|
|
|
|
|
|
|
|
- €: Age = 2.1
|
|
|
|
|
|
|
|
|
|
|
|
### Block
|
|
|
|
|
|
|
|
|
|
|
|
A contiguous range of code points. Blocks don’t overlap and their names
|
|
|
|
|
|
are unique.
|
|
|
|
|
|
|
|
|
|
|
|
- S: Block = Basic~Latin~ (range U+0000..U+007F)
|
|
|
|
|
|
- 🙂: Block = Emoticons (range U+1F600..U+1F64F)
|
|
|
|
|
|
|
|
|
|
|
|
### Script
|
|
|
|
|
|
|
|
|
|
|
|
A collection of characters used by one or more writing systems.
|
|
|
|
|
|
|
|
|
|
|
|
- Some scripts support several writing systems. For example, the Latin
|
|
|
|
|
|
script supports the writing systems English, French, German, Latin,
|
|
|
|
|
|
etc.
|
|
|
|
|
|
- Some languages can be written in multiple alternate writing systems
|
|
|
|
|
|
that are supported by multiple scripts. For example, Turkish used
|
|
|
|
|
|
the Arabic script before it transitioned to the Latin script in the
|
|
|
|
|
|
early 20th century.
|
|
|
|
|
|
|
|
|
|
|
|
1. Examples
|
|
|
|
|
|
|
|
|
|
|
|
- α: Script = Greek
|
|
|
|
|
|
- Д: Script = Cyrillic
|
|
|
|
|
|
|
|
|
|
|
|
# Footnotes
|
|
|
|
|
|
|
|
|
|
|
|
[^1]: <https://github.com/tc39/proposal-regexp-unicode-property-escapes>
|
