Correctly handle zero-length ANSI string (#15)

sindresorhus · Mar 17, 2021 · 32de93a · 32de93a
1 parent 47a0be0
commit 32de93a
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/index.js b/index.js
@@ -7,7 +7,13 @@ const stringLength = string => {
 		return 0;
 	}
 
-	return stripAnsi(string).match(charRegex()).length;
+	const strippedString = stripAnsi(string);
+
+	if (strippedString === '') {
+		return 0;
+	}
+
+	return strippedString.match(charRegex()).length;
 };
 
 module.exports = stringLength;
diff --git a/test.js b/test.js
@@ -3,6 +3,7 @@ const stringLength = require('.');
 
 test('get the real length of a string', t => {
 	t.is(stringLength(''), 0);
+	t.is(stringLength('\u001B[1m\u001B[22m'), 0);
 	t.is(stringLength('𠀔'), 1);
 	t.is(stringLength('foo𠁐bar𠀃'), 8);
 	t.is(stringLength('あ'), 1);