13 lines
504 B
Markdown
13 lines
504 B
Markdown
### extendHex
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Extends a 3-digit color code to a 6-digit color code.
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Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a 3-digit RGB notated hexadecimal color-code to the 6-digit form.
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`String.slice()` is used to remove `#` from string start since it's added once.
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```js
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const extendHex = shortHex =>
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'#' + shortHex.slice(shortHex.startsWith('#') ? 1 : 0).split('').map(x => x + x).join('');
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// extendHex('#03f') -> '#0033ff'
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// extendHex('05a') -> '#0055aa'
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```
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