Get the base URL without any parameters

Drop the query string and fragment.

JavaScript Version 1.0.0 · MIT · .md

function baseUrl(url) { return url.split(/[?#]/)[0]; }

Input & expected output

"https://example.com/unsubscribe?token=abc"

"https://example.com/unsubscribe"

The edge case

"https://example.com/#top"

"https://example.com/"

Know the limits

• The original removed only the query; a fragment is not a parameter either, so it is dropped too.
• Use new URL() when you need to keep or edit specific parameters.

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.