| 1 | [](https://www.npmjs.com/package/browser-capabilities)
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| 3 | # browser-capabilities
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| 4 |
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| 5 | A JavaScript library that detects browser capabilities from a user agent string.
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| 6 |
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| 7 | The following keywords are supported. See [browser-capabilities.ts](https://github.com/Polymer/tools/blob/master/packages/browser-capabilities/src/browser-capabilities.ts) for the latest browser support matrix.
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| 8 |
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| 9 | | Keyword | Description
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| 10 | | :---- | :----
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| 11 | | push | [HTTP/2 Server Push](https://developers.google.com/web/fundamentals/performance/http2/#server-push)
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| 12 | | serviceworker | [Service Worker API](https://developers.google.com/web/fundamentals/getting-started/primers/service-workers)
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| 13 | | modules | [JavaScript Modules](https://www.chromestatus.com/feature/5365692190687232) (including dynamic `import()` and `import.meta`)
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| 14 | | es2015 | [ECMAScript 2015 (aka ES6)](https://developers.google.com/web/shows/ttt/series-2/es2015)
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| 15 | | es2016 | ECMAScript 2016
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| 16 | | es2017 | ECMAScript 2017
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| 17 | | es2018 | ECMAScript 2018
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| 18 |
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