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Generates default units for jss-default-unit
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Default Props</title> | |
| </head> | |
| <body> | |
| <script> | |
| 'use strict' | |
| if (window.navigator.vendor !== 'Google Inc.') { | |
| alert('This was designed to be run in Chrome.') | |
| } | |
| /** | |
| * Remove '-webkit-' and un-apply camelCase. | |
| * | |
| * @function | |
| * @param {String} name | |
| * @return {String} | |
| */ | |
| function canonicalize(name) { | |
| name = name.replace('webkit', '') | |
| name = name.split('') | |
| name[0] = name[0].toLowerCase() | |
| return name.join('').replace(/([A-Z])/g, '-$1').toLowerCase() | |
| } | |
| /** | |
| * Find all properties that can a number (unit or no unit). | |
| * | |
| * @function | |
| * @return {Object} | |
| */ | |
| function mapTypesToCompatibleProps() { | |
| let div = document.createElement('div') | |
| let maps = { | |
| numeric: [], | |
| px: [], | |
| ms: [], | |
| pct: [] | |
| } | |
| document.body.appendChild(div) | |
| Object.keys(div.style).forEach((prop) => { | |
| div.style[prop] = 'abc' // Exclude props accepting arbitrary strings. | |
| if (div.style[prop] === 'abc') return | |
| div.style[prop] = '5' | |
| if (div.style[prop] === '5') maps.numeric.push(prop) | |
| div.style[prop] = '5px' | |
| if (div.style[prop] === '5px') maps.px.push(prop) | |
| div.style[prop] = '5ms' | |
| if (div.style[prop] === '5ms') maps.ms.push(prop) | |
| div.style[prop] = '5%' | |
| if (div.style[prop] === '5%') maps.pct.push(prop) | |
| }) | |
| return maps | |
| } | |
| /** | |
| * Map each CSS property to a default unit. | |
| * | |
| * @function | |
| * @return {String} - JSON string of prop-to-unit map. | |
| */ | |
| function getDefaultUnits() { | |
| let typesToProps = mapTypesToCompatibleProps() | |
| let map = {} | |
| typesToProps.px.forEach((prop) => { | |
| if (typesToProps.numeric.indexOf(prop) === -1) { | |
| map[canonicalize(prop)] = 'px' | |
| } | |
| }) | |
| typesToProps.ms.forEach((prop) => { | |
| if (typesToProps.numeric.indexOf(prop) === -1) { | |
| map[canonicalize(prop)] = 'ms' | |
| } | |
| }) | |
| typesToProps.pct.forEach((prop) => { | |
| if ( | |
| prop.indexOf('rigin') !== -1 || // Capture the various origin properties. | |
| (typesToProps.numeric.indexOf(prop) === -1 && | |
| typesToProps.px.indexOf(prop) === -1) | |
| ) map[canonicalize(prop)] = '%' | |
| }) | |
| return JSON.stringify(map, null, 2) | |
| } | |
| document.body.innerHTML = ( | |
| `<pre> | |
| /** | |
| * Generated jss-default-unit CSS property units | |
| * @object | |
| */ | |
| export default ${ | |
| getDefaultUnits() | |
| .replace(/"/g, '\'') | |
| .replace(/'([a-z0-9]+)'\:/g, '$1:') | |
| } | |
| </pre>` | |
| ) | |
| </script> | |
| </body> | |
| </html> |
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