Convert a string to camel case

Remove separators and uppercase the character after each one.

JavaScript Version 1.0.0 · MIT · .md

function toCamelCase(text) { return text.trim().replace(/[-_\s]+(.)?/g, (_, char) => char ? char.toUpperCase() : ''); }

Input & expected output

"idempotency key"

"idempotencyKey"

The edge case

"--leading"

"Leading"

Know the limits

• A leading separator uppercases the first letter, as the edge case shows. The first word is otherwise kept as typed.

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.