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Update hexToRGB.md

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David Wu
2017-12-17 18:33:57 +01:00
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snippets/hexToRGB.md
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Converts a colorcode to a `rgb()` string. Converts a colorcode to a `rgb()` string.
Use bitwise right-shift operator and mask bits with `&` (and) operator to convert a hexadecimal color code (prefixed with `#`) to a string with the RGB values. Use bitwise right-shift operator and mask bits with `&` (and) operator to convert a hexadecimal color code (prefixed with `#`) to a string with the RGB values. In case it's a 3-digit-colorcode, do the same with the 6-digit-colorcode extended by the extendHex() function (ref. `extendHex` snippet)
```js ```js
const hexToRGB = hex => { const hexToRgb = hex => {
const h = parseInt(hex.slice(1), 16); const extendHex = shortHex =>
return `rgb(${h >> 16}, ${(h & 0x00ff00) >> 8}, ${h & 0x0000ff})`; '#' + shortHex.slice(shortHex.startsWith('#') ? 1 : 0).split('').map(x => x+x).join('');
return hex.slice(1).length==3 ?
`rgb(${parseInt(extendHex(hex).slice(1), 16) >> 16}, ${(parseInt(extendHex(hex).slice(1), 16) & 0x00ff00) >> 8}, ${parseInt(extendHex(hex).slice(1), 16) & 0x0000ff})`:
`rgb(${parseInt(hex.slice(1), 16) >> 16}, ${(parseInt(hex.slice(1), 16) & 0x00ff00) >> 8}, ${parseInt(hex.slice(1), 16) & 0x0000ff})`;
} }
// hexToRgb('#27ae60') -> 'rgb(39, 174, 96)' // hexToRgb('#27ae60') -> 'rgb(39, 174, 96)'
// hexToRgb('#acd') -> 'rgb(170, 204, 221)'
``` ```