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Merge pull request #230 from wojtekmaj/bugfix/hexToRgb

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hexToRgb: Fix returning wrong value for short hash without # symbol, fix extendHex called 3 times
This commit is contained in:
Angelos Chalaris
2017-12-18 12:38:51 +02:00
committed by GitHub
parent 0fced30fc3 2da5a15f68
commit 57094bb9e9
1 changed files with 4 additions and 5 deletions
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9
snippets/hexToRGB.md
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@ -6,12 +6,11 @@ Use bitwise right-shift operator and mask bits with `&` (and) operator to conver
```js
const hexToRgb = hex => {
const extendHex = shortHex =>
const extendHex = shortHex =>
'#' + 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}, ${parseInt(hex.slice(1), 16) & 0x0000ff})`;
}
const extendedHex = hex.slice(hex.startsWith('#') ? 1 : 0).length === 3 ? extendHex(hex) : hex;
return `rgb(${parseInt(extendedHex.slice(1), 16) >> 16}, ${(parseInt(extendedHex.slice(1), 16) & 0x00ff00) >> 8}, ${parseInt(extendedHex.slice(1), 16) & 0x0000ff})`;
}
// hexToRgb('#27ae60') -> 'rgb(39, 174, 96)'
// hexToRgb('#acd') -> 'rgb(170, 204, 221)'
```