Replace multiple spaces with a single space

Collapse runs of two or more whitespace characters.

JavaScript Version 1.0.0 · MIT · .md

function collapseSpaces(text) { return text.replace(/\s\s+/g, ' '); }

Input & expected output

"Small   code\n\nworks"

"Small code works"

The edge case

"a\tb"

"a\tb"

Know the limits

• A single tab or line break is left as it is, as the edge case shows.

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.