strip-ansi/index.js

Strip ANSI escape codes from a string

import ansiRegex from 'ansi-regex';

const regex = ansiRegex();

export default function stripAnsi(string) {
	if (typeof string !== 'string') {
		throw new TypeError(`Expected a \`string\`, got \`${typeof string}\``);
	}

	// Fast path: ANSI codes require ESC (7-bit) or CSI (8-bit) introducer
	if (!string.includes('\u001B') && !string.includes('\u009B')) {
		return string;
	}

	// Even though the regex is global, we don't need to reset the `.lastIndex`
	// because unlike `.exec()` and `.test()`, `.replace()` does it automatically
	// and doing it manually has a performance penalty.
	return string.replace(regex, '');
}