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https://github.com/browserslist/browserslist-useragent-regexp
A utility to compile browserslist query to a RegExp to test browser useragent.
https://github.com/browserslist/browserslist-useragent-regexp
Last synced: 3 days ago
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A utility to compile browserslist query to a RegExp to test browser useragent.
- Host: GitHub
- URL: https://github.com/browserslist/browserslist-useragent-regexp
- Owner: browserslist
- License: mit
- Created: 2019-03-17T20:30:41.000Z (almost 6 years ago)
- Default Branch: master
- Last Pushed: 2024-11-14T18:42:50.000Z (about 1 month ago)
- Last Synced: 2024-11-24T17:54:37.623Z (29 days ago)
- Language: TypeScript
- Homepage:
- Size: 3.15 MB
- Stars: 250
- Watchers: 6
- Forks: 19
- Open Issues: 16
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
- awesome-list - browserslist-useragent-regexp
README
# browserslist-useragent-regexp
[![ESM-only package][package]][package-url]
[![NPM version][npm]][npm-url]
[![Node version][node]][node-url]
[![Dependencies status][deps]][deps-url]
[![Install size][size]][size-url]
[![Build status][build]][build-url]
[![Coverage status][coverage]][coverage-url]
[![Documentation badge][documentation]][documentation-url]
[package]: https://img.shields.io/badge/package-ESM--only-ffe536.svg
[package-url]: https://nodejs.org/api/esm.html
[npm]: https://img.shields.io/npm/v/browserslist-useragent-regexp.svg
[npm-url]: https://npmjs.com/package/browserslist-useragent-regexp
[node]: https://img.shields.io/node/v/browserslist-useragent-regexp.svg
[node-url]: https://nodejs.org
[deps]: https://img.shields.io/librariesio/release/npm/browserslist-useragent-regexp
[deps-url]: https://libraries.io/npm/browserslist-useragent-regexp/tree
[size]: https://packagephobia.com/badge?p=browserslist-useragent-regexp
[size-url]: https://packagephobia.com/result?p=browserslist-useragent-regexp
[build]: https://img.shields.io/github/actions/workflow/status/browserslist/browserslist-useragent-regexp/tests.yml?branch=master
[build-url]: https://github.com/browserslist/browserslist-useragent-regexp/actions
[coverage]: https://img.shields.io/codecov/c/github/browserslist/browserslist-useragent-regexp.svg
[coverage-url]: https://app.codecov.io/gh/browserslist/browserslist-useragent-regexp
[documentation]: https://img.shields.io/badge/API-Documentation-2b7489.svg
[documentation-url]: https://browserslist.github.io/browserslist-useragent-regexp
A utility to compile [browserslist query](https://github.com/browserslist/browserslist#queries) to a regex to test browser useragent. Simplest example: you can detect supported browsers on client-side.
1) Create `.browserslistrc` config, for example like this:
```
last 2 versions
not dead
```
2) Add script to `package.json`:
```json
{
"scripts": {
"supportedBrowsers": "echo \"export default $(browserslist-useragent-regexp --allowHigherVersions);\" > supportedBrowsers.js"
}
}
```
for Windows users
```json
{
"scripts": {
"supportedBrowsers": "(echo export default && browserslist-useragent-regexp --allowHigherVersions) > supportedBrowsers.js"
}
}
```
3) Run this script, to compile regex:
```bash
pnpm supportedBrowsers
# or
npm run supportedBrowsers
# or
yarn supportedBrowsers
```
`supportedBrowsers.js`:
```js
export default /Edge?\/(10[5-9]|1[1-9]\d|[2-9]\d\d|\d{4,})(\.\d+|)(\.\d+|)|Firefox\/(10[4-9]|1[1-9]\d|[2-9]\d\d|\d{4,})\.\d+(\.\d+|)|Chrom(ium|e)\/(10[5-9]|1[1-9]\d|[2-9]\d\d|\d{4,})\.\d+(\.\d+|)|Maci.* Version\/(15\.([6-9]|\d{2,})|(1[6-9]|[2-9]\d|\d{3,})\.\d+)([,.]\d+|)( Mobile\/\w+|) Safari\/|Chrome.+OPR\/(9\d|\d{3,})\.\d+\.\d+|(CPU[ +]OS|iPhone[ +]OS|CPU[ +]iPhone|CPU IPhone OS|CPU iPad OS)[ +]+(15[._]([6-9]|\d{2,})|(1[6-9]|[2-9]\d|\d{3,})[._]\d+)([._]\d+|)|Opera Mini|Android:?[ /\-](10[6-9]|1[1-9]\d|[2-9]\d{2}|\d{4,})(\.\d+|)(\.\d+|)|Mobile Safari.+OPR\/(6[4-9]|[7-9]\d|\d{3,})\.\d+\.\d+|Android.+Firefox\/(10[5-9]|1[1-9]\d|[2-9]\d\d|\d{4,})\.\d+(\.\d+|)|Android.+Chrom(ium|e)\/(10[6-9]|1[1-9]\d|[2-9]\d\d|\d{4,})\.\d+(\.\d+|)|Android.+(UC? ?Browser|UCWEB|U3)[ /]?(13\.([4-9]|\d{2,})|(1[4-9]|[2-9]\d|\d{3,})\.\d+)\.\d+|SamsungBrowser\/(1[7-9]|[2-9]\d|\d{3,})\.\d+|Android.+MQQBrowser\/(13(\.([1-9]|\d{2,})|)|(1[4-9]|[2-9]\d|\d{3,})(\.\d+|))(\.\d+|)|K[Aa][Ii]OS\/(2\.([5-9]|\d{2,})|([3-9]|\d{2,})\.\d+)(\.\d+|)/;
```
4) Import regex from created file:
```js
import supportedBrowsers from './supportedBrowsers.js';
if (supportedBrowsers.test(navigator.userAgent)) {
alert('Your browser is supported.');
}
```
## Install
```bash
pnpm add -D browserslist-useragent-regexp
# or
npm i -D browserslist-useragent-regexp
# or
yarn add -D browserslist-useragent-regexp
```
## Why?
As was written in article ["Smart Bundling: Shipping legacy code to only legacy browsers"](https://www.smashingmagazine.com/2018/10/smart-bundling-legacy-code-browsers/): you can determinate, which bundle you should give to browser from server with [`browserslist-useragent`](https://github.com/browserslist/browserslist-useragent). But in this case you must have your own server with special logic. Now, with `browserslist-useragent-regexp`, you can move that to client-side.
Development was inspired by [this proposal from Mathias Bynens](https://twitter.com/mathias/status/1105857829393653761).
How to make differential resource loading and other optimizations with `browserslist-useragent-regexp` you can read in article ["Speed up with Browserslist"](https://dev.to/dangreen/speed-up-with-browserslist-30lh).
[Demo](https://browserslist.github.io/browserslist-useragent-regexp/demo.html) ([sources](https://github.com/browserslist/browserslist-useragent-regexp/blob/7cf6afb7da2b6c77179abb8b8bd1bbcb61cf376a/docs/demo.html#L17-L29), [build script](https://github.com/browserslist/browserslist-useragent-regexp/blob/7cf6afb7da2b6c77179abb8b8bd1bbcb61cf376a/examples/buildDemo.js#L61-L74)).
Also, testing useragents using generated regex [is faster](https://gist.github.com/dangreen/55c41072d8891efd3a772a4739d6cd9d) than using the `matchesUA` method from browserslist-useragent.
## CLI
```bash
pnpm browserslist-useragent-regexp [query] [...options]
# or
npx browserslist-useragent-regexp [query] [...options]
# or
yarn exec -- browserslist-useragent-regexp [query] [...options]
```
Also, short alias is available:
```bash
pnpm bluare [query] [...options]
```
| Option | Description | Default |
|--------|-------------|---------|
| query | Manually provide a browserslist query. Specifying this overrides the browserslist configuration specified in your project. | |
| ‑‑help, -h | Print this message. | |
| ‑‑verbose, -v | Print additional info about regexes. | |
| ‑‑ignorePatch | Ignore differences in patch browser numbers. | `true` |
| ‑‑ignoreMinor | Ignore differences in minor browser versions. | `false` |
| ‑‑allowHigherVersions | For all the browsers in the browserslist query, return a match if the useragent version is equal to or higher than the one specified in browserslist. | `false` |
| ‑‑allowZeroSubversions | Ignore match of patch or patch and minor, if they are 0. | `false` |
## JS API basics
Module exposes two main methods:
### [getUserAgentRegexes(options)](https://browserslist.github.io/browserslist-useragent-regexp/functions/getUserAgentRegexes.html)
Compile browserslist query to [regexes for each browser](#regex-info-object).
### [getUserAgentRegex(options)](https://browserslist.github.io/browserslist-useragent-regexp/functions/getUserAgentRegex.html)
Compile browserslist query to one regex.
> [Description of all methods you can find in Documentation.](https://browserslist.github.io/browserslist-useragent-regexp/index.html)
#### Options
| Option | Type | Default | Description |
|--------|------|---------|-------------|
| browsers | `string \| string[]` | — | Manually provide a browserslist query (or an array of queries). Specifying this overrides the browserslist configuration specified in your project. |
| ignorePatch | `boolean` | `true` | Ignore differences in patch browser numbers. |
| ignoreMinor | `boolean` | `false` | Ignore differences in minor browser versions. |
| allowHigherVersions | `boolean` | `false` | For all the browsers in the browserslist query, return a match if the useragent version is equal to or higher than the one specified in browserslist. |
| allowZeroSubversions | `boolean` | `false` | Ignore match of patch or patch and minor, if they are 0. |
Any of the [`browserslist` API options](https://github.com/browserslist/browserslist#js-api) may also be provided.
#### Regex info object
| Property | Type | Description |
|----------|------|-------------|
| family | `string` | Browser family. |
| requestVersions | `[number, number, number][]` | Versions provided by browserslist. |
| regex | `RegExp` | Regex to match useragent with family and versions. |
| sourceRegex | `RegExp` | Original useragent regex, without versions. |
| version | `[number, number, number] \| null` | Useragent version of regex. |
| minVersion | `[number, number, number] \| null` | Useragent min version of regex. |
| maxVersion | `[number, number, number] \| null` | Useragent max version of regex. |
## Other
- [Supported browsers](https://github.com/browserslist/browserslist-useragent#supported-browsers)
- [Notes](https://github.com/browserslist/browserslist-useragent#notes)
- [When querying for modern browsers](https://github.com/browserslist/browserslist-useragent#when-querying-for-modern-browsers)