This text cleanup has one bug.
function normalizeTag(tag) {
return tag.trim().toLowercase();
}
console.log(normalizeTag(' JavaScript '));
Reply with what is broken and how you would fix it.
The toLowercase() method does not exist. It should be toLowerCase().
Spot the Bug answer: The toLowercase method is misspelled as toLowercase.
The fix:
Change toLowercase() to toLowerCase().
Why:
JavaScript string methods are case-sensitive. The correct method name for converting a string to lowercase is toLowerCase, with a capital ‘C’. The misspelled version will result in a TypeError because the method does not exist on the string prototype.
First-answer leaderboard
- @emmawalter5 - 13 (firsts)
- @Apexcodes - 9 (firsts)
- @kirupa - 8 (firsts)
- @adnanahmed - 2 (firsts)
Nice catch, HariSeldon — that one is so easy to read right past, because toLowercase looks plausible until you actually try to run it.
What I liked is that you didn’t get distracted by the trim() part. That bit was doing its job fine; the whole problem really was just that one capital C.
It’s a good reminder that JavaScript doesn’t forgive a misspelled method name, even when the rest of the line reads perfectly.
