Merge pull request DefinitelyTyped#5974 from JKillian/fix-classNames-types

Accept arrays and nested arrays

Author: horiuchi

classnames/classnames-tests.ts

@@ -8,9 +8,16 @@ classNames('foo', 'bar'); // => 'foo bar'
 classNames('foo', { bar: true }); // => 'foo bar'
 classNames({ foo: true }, { bar: true }); // => 'foo bar'
 classNames({ foo: true, bar: true }); // => 'foo bar'
+classNames(10, 11); // => '10 11';
 
 // lots of arguments of various types
-classNames('foo', { bar: true, duck: false }, 'baz', { quux: true }) // => 'foo bar baz quux'
+classNames('foo', { bar: true, duck: false }, 'baz', { quux: true }); // => 'foo bar baz quux'
+
+classNames(['foo', 'bar', 'baz']); // => 'foo bar baz'
+classNames([1, 2, 3]); // => '1 2 3'
+classNames([{ foo: true, bar: false }, { baz: true }]); // => 'foo baz'
+
+classNames(["foo", ["bar", {baz: true}]]); // => 'foo bar baz'
 
 // other falsy values are just ignored
 // NOTE: We don't really want to allow this kind of thing with Typescript (otherwise what's the point!)

classnames/classnames.d.ts

@@ -1,14 +1,18 @@
 // Type definitions for classnames
 // Project: https://github.com/JedWatson/classnames
-// Definitions by: Dave Keen <http://www.keendevelopment.ch>, Adi Dahiya <https://github.com/adidahiya>
+// Definitions by: Dave Keen <http://www.keendevelopment.ch>, Adi Dahiya <https://github.com/adidahiya>, Jason Killian <https://github.com/JKillian>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
+declare type ClassValue = string | number | ClassDictionary | ClassArray;
+
 interface ClassDictionary {
 	[id: string]: boolean;
 }
 
+interface ClassArray extends Array<ClassValue> { }
+
 interface ClassNamesFn {
-	(...classes: (string | ClassDictionary)[]): string;
+	(...classes: ClassValue[]): string;
 }
 
 declare var classNames: ClassNamesFn;