Strip ANSI codes from a string

Remove terminal color and cursor escape sequences.

JavaScript Version 1.0.0 · MIT · .md

function stripAnsi(text) { return text.replace(/[\u001b\u009b][[()#;?]*(?:[0-9]{1,4}(?:;[0-9]{0,4})*)?[0-9A-ORZcf-nqry=><]/g, ''); }

Input & expected output

"\u001b[31mError\u001b[0m"

"Error"

The edge case

"plain"

"plain"

Know the limits

• Covers SGR colors and common CSI sequences, not every operating-system command sequence.

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.