Uppercase the first character of each word

Capitalize every space-separated word.

JavaScript Version 1.0.0 · MIT · .md

function uppercaseWords(text) { return text.split(' ').map(word => `${word.charAt(0).toUpperCase()}${word.slice(1)}`).join(' '); }

Input & expected output

"send receive prove"

"Send Receive Prove"

The edge case

"a  b"

"A  B"

Know the limits

• Only spaces separate words; this is not language-aware title case.

The function above is the implementation used by the lab. The lab validates JSON types and caps size before execution; include equivalent validation when accepting untrusted input in your application.

Keep exploring

• Capitalize a string — Uppercase the first Unicode code point and preserve the remaining text.
• Reverse a string — Reverse Unicode code points without splitting surrogate pairs.
• Check a palindrome — Compare a string with its code-point reversal.