@@ -7,8 +7,8 @@ export default function stripAnsi(string) {
 		throw new TypeError(`Expected a \`string\`, got \`${typeof string}\``);
 	}
 
-	// Fast path: if no ESC byte exists, there are no ANSI codes
-	if (!string.includes('\u001B')) {
+	// Fast path: ANSI codes require ESC (7-bit) or CSI (8-bit) introducer
+	if (!string.includes('\u001B') && !string.includes('\u009B')) {
 		return string;
 	}
 
 
@@ -16,3 +16,15 @@ test('strip reset;setfg;setbg;italics;strike;underline sequence from string', t
 test('strip link from terminal link', t => {
 	t.is(stripAnsi('\u001B]8;;https://github.com\u0007click\u001B]8;;\u0007'), 'click');
 });
+
+test('strip color from string using 8-bit CSI introducer', t => {
+	t.is(stripAnsi('\u009B31mfoo\u009B39m'), 'foo');
+});
+
+test('return string as-is if no ANSI codes', t => {
+	t.is(stripAnsi('foo bar'), 'foo bar');
+});
+
+test('return empty string as-is', t => {
+	t.is(stripAnsi(''), '');
+});
Original file line number	Diff line number	Diff line change
`@@ -7,8 +7,8 @@ export default function stripAnsi(string) {`
`7`	`7`	throw new TypeError(`Expected a \`string\`, got \`${typeof string}\``);
`8`	`8`	`}`
`9`	`9`
`10`		`- // Fast path: if no ESC byte exists, there are no ANSI codes`
`11`		`- if (!string.includes('\u001B')) {`
	`10`	`+ // Fast path: ANSI codes require ESC (7-bit) or CSI (8-bit) introducer`
	`11`	`+ if (!string.includes('\u001B') && !string.includes('\u009B')) {`
`12`	`12`	`return string;`
`13`	`13`	`}`
`14`	`14`