Decapitalize a string

Lowercase the first code point and keep the rest.

JavaScript Version 1.0.0 · MIT · .md

function decapitalize(text) { const [first = '', ...rest] = Array.from(text); return first.toLowerCase() + rest.join(''); }

Input & expected output

"Hello"

"hello"

The edge case

""

""

Know the limits

• Not locale-aware: Turkish dotted İ needs toLocaleLowerCase("tr").

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.