1 | # [postcss][postcss]-convert-values
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2 |
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3 | > Convert values with PostCSS (e.g. ms -> s)
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4 |
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5 | ## Install
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6 |
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7 | With [npm](https://npmjs.org/package/postcss-convert-values) do:
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8 |
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9 | ```
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10 | npm install postcss-convert-values --save
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11 | ```
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12 |
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13 | ## Example
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14 |
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15 | This plugin reduces CSS size by converting values to use different units
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16 | where possible; for example, `500ms` can be represented as `.5s`. You can
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17 | read more about these units in [this article][csstricks].
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18 |
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19 | ### Input
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20 |
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21 | ```css
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22 | h1 {
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23 | font-size: 16px;
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24 | width: 0em
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25 | }
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26 | ```
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27 |
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28 | ### Output
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29 |
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30 | ```css
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31 | h1 {
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32 | font-size: 1pc;
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33 | width: 0
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34 | }
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35 | ```
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36 |
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37 | Note that this plugin only covers conversions for duration and absolute length
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38 | values. For color conversions, use [postcss-colormin][colormin].
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39 |
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40 | ## API
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41 |
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42 | ### convertValues([options])
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43 |
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44 | #### options
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45 |
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46 | ##### length
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47 |
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48 | Type: `boolean`
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49 | Default: `true`
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50 |
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51 | Pass `false` to disable conversion from `px` to other absolute length units,
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52 | such as `pc` & `pt` & vice versa.
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53 |
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54 | ##### time
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55 |
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56 | Type: `boolean`
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57 | Default: `true`
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58 |
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59 | Pass `false` to disable conversion from `ms` to `s` & vice versa.
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60 |
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61 | ##### angle
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62 |
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63 | Type: `boolean`
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64 | Default: `true`
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65 |
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66 | Pass `false` to disable conversion from `deg` to `turn` & vice versa.
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67 |
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68 | ##### precision
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69 |
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70 | Type: `boolean|number`
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71 | Default: `false`
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72 |
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73 | Specify any numeric value here to round `px` values to that many decimal places;
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74 | for example, using `{precision: 2}` will round `6.66667px` to `6.67px`, and
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75 | `{precision: 0}` will round it to `7px`. Passing `false` (the default) will
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76 | leave these values as is.
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77 |
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78 | It is recommended for most use cases to set this option to `2`.
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79 |
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80 |
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81 | ## Usage
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82 |
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83 | See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
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84 | examples for your environment.
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85 |
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86 |
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87 | ## Contributors
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88 |
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89 | See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
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90 |
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91 |
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92 | ## License
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93 |
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94 | MIT © [Ben Briggs](http://beneb.info)
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95 |
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96 |
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97 | [postcss]: https://github.com/postcss/postcss
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98 | [csstricks]: https://css-tricks.com/the-lengths-of-css/
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