Package Exports

browserslist

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (browserslist) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Browserslist

Get browser versions that match given criteria. Useful for tools like Autoprefixer.

You can select browsers by passing a string. This library will use Can I Use data to return the appropriate list of all matching versions.

For example, the last version of each major browser and versions, with a usage of over 5% in global usage statistics:

browserslist('last 1 version, > 5%');
//=> ['and_chr 40', 'chrome 40', 'chrome 39', 'firefox 35', 'firefox 34',
//    'ie 11', 'ie_mob 11', 'ios_saf 8.1', 'opera 27', 'safari 8']

Browserslist will use browsers criterias from:

First argument.
BROWSERSLIST environment variable.
browserslist config file in current or parent directories.
If all methods will not give a result, Browserslist will use defaults:
> 1%, last 2 versions, Firefox ESR, Opera 12.1.

Queries

You can specify the browsers by queries (case insensitive):

last 2 versions: the last 2 versions for each major browser.
last 2 Chrome versions: the last 2 versions of Chrome browser.
> 5%: versions selected by global usage statistics.
> 5% in US: uses USA usage statistics. It accepts two-letter country code.
Firefox > 20: versions of Firefox newer than 20.
Firefox >= 20: versions of Firefox newer than or equal to 20.
Firefox < 20: versions of Firefox less than 20.
Firefox <= 20: versions of Firefox less than or equal to 20.
Firefox ESR: the latest [Firefox ESR] version.
iOS 7: the iOS browser version 7 directly.

Blackberry and Android WebView will not be used in last n versions. You should add them by name.

Browsers

Names are case insensitive:

Android for Android WebView.
BlackBerry or bb for Blackberry browser.
Chrome for Google Chrome.
Firefox or ff for Mozilla Firefox.
Explorer or ie for Internet Explorer.
iOS or ios_saf for iOS Safari.
Opera for Opera.
Safari for desktop Safari.
OperaMobile or op_mob for Opera Mobile.
OperaMini or op_mini for Opera Mini.
ChromeAndroid or and_chr for Chrome for Android (mostly same as common Chrome).
FirefoxAndroid or and_ff for Firefox for Android.
ExplorerMobile or ie_mob for Internet Explorer Mobile.

Usage

var browserslist = require('browserslist');

// Your CSS/JS build tool code
var process = function (css, opts) {
    var browsers = browserslist(opts.browsers, { path: opts.file });
    // Your code to add features for selected browsers
}

If a list is missing, Browserslist will look for a config file. You can provide a path option (that can be a file) to find the config file relatively to it.

Queries can be a string "> 5%, last 1 version" or an array ['> 5%', 'last 1 version'].

Config File

Browserslist’s config should be named browserslist and have browsers queries split by a new line. You can write a comment after #:

# Browsers that we support

> 1%
Last 2 versions
IE 8 # sorry