index.js

export default function ansiRegex({onlyFirst = false} = {}) {
	// Valid string terminator sequences are BEL, ESC\, and 0x9c
	const ST = '(?:\\u0007|\\u001B\\u005C|\\u009C)';
	const pattern = [
		`[\\u001B\\u009B][[\\]()#;?]*(?:(?:(?:(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]+)*|[a-zA-Z\\d]+(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]*)*)?${ST})`,
		'(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PR-TZcf-nq-uy=><~]))',
	].join('|');

	return new RegExp(pattern, onlyFirst ? undefined : 'g');
}