106 lines
3.5 KiB
Markdown
106 lines
3.5 KiB
Markdown
# emoji-regex [](https://github.com/mathiasbynens/emoji-regex/actions/workflows/main.yml) [](https://www.npmjs.com/package/emoji-regex)
|
||
|
||
_emoji-regex_ offers a regular expression to match all emoji symbols and sequences (including textual representations of emoji) as per the Unicode Standard. It’s based on [_emoji-test-regex-pattern_](https://github.com/mathiasbynens/emoji-test-regex-pattern), which generates (at build time) the regular expression pattern based on the Unicode Standard. As a result, _emoji-regex_ can easily be updated whenever new emoji are added to Unicode.
|
||
|
||
## Installation
|
||
|
||
Via [npm](https://www.npmjs.com/):
|
||
|
||
```bash
|
||
npm install emoji-regex
|
||
```
|
||
|
||
In [Node.js](https://nodejs.org/):
|
||
|
||
```js
|
||
const emojiRegex = require('emoji-regex');
|
||
// Note: because the regular expression has the global flag set, this module
|
||
// exports a function that returns the regex rather than exporting the regular
|
||
// expression itself, to make it impossible to (accidentally) mutate the
|
||
// original regular expression.
|
||
|
||
const text = `
|
||
\u{231A}: ⌚ default emoji presentation character (Emoji_Presentation)
|
||
\u{2194}\u{FE0F}: ↔️ default text presentation character rendered as emoji
|
||
\u{1F469}: 👩 emoji modifier base (Emoji_Modifier_Base)
|
||
\u{1F469}\u{1F3FF}: 👩🏿 emoji modifier base followed by a modifier
|
||
`;
|
||
|
||
const regex = emojiRegex();
|
||
for (const match of text.matchAll(regex)) {
|
||
const emoji = match[0];
|
||
console.log(`Matched sequence ${ emoji } — code points: ${ [...emoji].length }`);
|
||
}
|
||
```
|
||
|
||
Console output:
|
||
|
||
```
|
||
Matched sequence ⌚ — code points: 1
|
||
Matched sequence ⌚ — code points: 1
|
||
Matched sequence ↔️ — code points: 2
|
||
Matched sequence ↔️ — code points: 2
|
||
Matched sequence 👩 — code points: 1
|
||
Matched sequence 👩 — code points: 1
|
||
Matched sequence 👩🏿 — code points: 2
|
||
Matched sequence 👩🏿 — code points: 2
|
||
```
|
||
|
||
## For maintainers
|
||
|
||
### How to update emoji-regex after new Unicode Standard releases
|
||
|
||
1. [Update _emoji-test-regex-pattern_ as described in its repository](https://github.com/mathiasbynens/emoji-test-regex-pattern#how-to-update-emoji-test-regex-pattern-after-new-uts51-releases).
|
||
|
||
1. Bump the _emoji-test-regex-pattern_ dependency to the latest version.
|
||
|
||
1. Update the Unicode data dependency in `package.json` by running the following commands:
|
||
|
||
```sh
|
||
# Example: updating from Unicode v13 to Unicode v14.
|
||
npm uninstall @unicode/unicode-13.0.0
|
||
npm install @unicode/unicode-14.0.0 --save-dev
|
||
````
|
||
|
||
1. Generate the new output:
|
||
|
||
```sh
|
||
npm run build
|
||
```
|
||
|
||
1. Verify that tests still pass:
|
||
|
||
```sh
|
||
npm test
|
||
```
|
||
|
||
### How to publish a new release
|
||
|
||
1. On the `main` branch, bump the emoji-regex version number in `package.json`:
|
||
|
||
```sh
|
||
npm version patch -m 'Release v%s'
|
||
```
|
||
|
||
Instead of `patch`, use `minor` or `major` [as needed](https://semver.org/).
|
||
|
||
Note that this produces a Git commit + tag.
|
||
|
||
1. Push the release commit and tag:
|
||
|
||
```sh
|
||
git push && git push --tags
|
||
```
|
||
|
||
Our CI then automatically publishes the new release to npm.
|
||
|
||
## Author
|
||
|
||
| [](https://twitter.com/mathias "Follow @mathias on Twitter") |
|
||
|---|
|
||
| [Mathias Bynens](https://mathiasbynens.be/) |
|
||
|
||
## License
|
||
|
||
_emoji-regex_ is available under the [MIT](https://mths.be/mit) license.
|