| 1 | # ms
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| 2 |
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| 3 | [](https://travis-ci.org/zeit/ms)
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| 4 | [](https://spectrum.chat/zeit)
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| 5 |
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| 6 | Use this package to easily convert various time formats to milliseconds.
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| 7 |
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| 8 | ## Examples
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| 9 |
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| 10 | ```js
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| 11 | ms('2 days') // 172800000
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| 12 | ms('1d') // 86400000
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| 13 | ms('10h') // 36000000
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| 14 | ms('2.5 hrs') // 9000000
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| 15 | ms('2h') // 7200000
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| 16 | ms('1m') // 60000
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| 17 | ms('5s') // 5000
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| 18 | ms('1y') // 31557600000
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| 19 | ms('100') // 100
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| 20 | ms('-3 days') // -259200000
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| 21 | ms('-1h') // -3600000
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| 22 | ms('-200') // -200
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| 23 | ```
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| 24 |
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| 25 | ### Convert from Milliseconds
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| 26 |
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| 27 | ```js
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| 28 | ms(60000) // "1m"
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| 29 | ms(2 * 60000) // "2m"
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| 30 | ms(-3 * 60000) // "-3m"
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| 31 | ms(ms('10 hours')) // "10h"
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| 32 | ```
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| 33 |
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| 34 | ### Time Format Written-Out
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| 35 |
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| 36 | ```js
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| 37 | ms(60000, { long: true }) // "1 minute"
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| 38 | ms(2 * 60000, { long: true }) // "2 minutes"
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| 39 | ms(-3 * 60000, { long: true }) // "-3 minutes"
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| 40 | ms(ms('10 hours'), { long: true }) // "10 hours"
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| 41 | ```
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| 42 |
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| 43 | ## Features
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| 44 |
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| 45 | - Works both in [Node.js](https://nodejs.org) and in the browser
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| 46 | - If a number is supplied to `ms`, a string with a unit is returned
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| 47 | - If a string that contains the number is supplied, it returns it as a number (e.g.: it returns `100` for `'100'`)
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| 48 | - If you pass a string with a number and a valid unit, the number of equivalent milliseconds is returned
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| 49 |
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| 50 | ## Related Packages
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| 51 |
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| 52 | - [ms.macro](https://github.com/knpwrs/ms.macro) - Run `ms` as a macro at build-time.
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| 53 |
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| 54 | ## Caught a Bug?
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| 55 |
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| 56 | 1. [Fork](https://help.github.com/articles/fork-a-repo/) this repository to your own GitHub account and then [clone](https://help.github.com/articles/cloning-a-repository/) it to your local device
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| 57 | 2. Link the package to the global module directory: `npm link`
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| 58 | 3. Within the module you want to test your local development instance of ms, just link it to the dependencies: `npm link ms`. Instead of the default one from npm, Node.js will now use your clone of ms!
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| 59 |
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| 60 | As always, you can run the tests using: `npm test`
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