Handle empty strings (#8)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>
sindresorhus · Mar 19, 2020 · cb19fd4 · cb19fd4
1 parent ad032d3
commit cb19fd4
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diff --git a/index.js b/index.js
@@ -2,6 +2,12 @@
 const stripAnsi = require('strip-ansi');
 const charRegex = require('char-regex');
 
-const stringLength = string => stripAnsi(string).match(charRegex()).length;
+const stringLength = string => {
+	if (string === '') {
+		return 0;
+	}
+
+	return stripAnsi(string).match(charRegex()).length;
+};
 
 module.exports = stringLength;
diff --git a/test.js b/test.js
@@ -2,6 +2,7 @@ const test = require('ava');
 const stringLength = require('.');
 
 test('get the real length of a string', t => {
+	t.is(stringLength(''), 0);
 	t.is(stringLength('𠀔'), 1);
 	t.is(stringLength('foo𠁐bar𠀃'), 8);
 	t.is(stringLength('あ'), 1);