11 lines
474 B
Markdown
11 lines
474 B
Markdown
### 3-digit hexcode to 6-digit hexcode
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Use `Array.map()`, `split()` and `Array.join()` to join the mapped array for converting a three-digit RGB notated hexadecimal color-code to the six-digit form.
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`Array.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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// convertHex('#03f') -> '#0033ff'
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// convertHex('05a') -> '#0055aa'
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```
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