Spot the bug - #97: Theme Color Parser

programming web dev
1

Color helper has one tiny bug.

function normalizeHex(hex) {
  const value = hex.startsWith('#') ? hex : '#' + hex;
  return value.slice(0, 6);
}

console.log(normalizeHex('#12abef'));

Reply with what is broken and how you would fix it.

2

Is it the range used by slice?

3

Close, but the range isn’t the bug by itself. slice(0, 6) counts from index 0, and the # is sitting right there at index 0. So you’re keeping the # plus only 5 hex chars, not 6.

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