Brute force property removal when removeData([a,b,c]). Fixes #12786

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>

src/data.js

@@ -136,6 +136,14 @@ function internalRemoveData( elem, name, pvt /* For internal use only */ ){
 						name = name.split(" ");
 					}
 				}
+			} else {
+				// If "name" is an array of keys...
+				// When data is initially created, via ("key", "val") signature,
+				// keys will be converted to camelCase.
+				// Since there is no way to tell _how_ a key was added, remove
+				// both plain key and camelCase key. #12786
+				// This will only penalize the array argument path.
+				name = name.concat( jQuery.map( name, jQuery.camelCase ) );
 			}
 
 			for ( i = 0, l = name.length; i < l; i++ ) {

test/unit/data.js

@@ -621,6 +621,76 @@ test("jQuery.data supports interoperable removal of hyphenated/camelCase propert
 	});
 });
 
+test( "jQuery.fn.removeData supports interoperable removal of hyphenated properties via array (#12786)", function() {
+	expect( 10 );
+
+	var div, plain, datas, keys;
+
+	div = jQuery("<div/>", { id: "test12786" }).appendTo("#qunit-fixture"),
+	datas = {
+		"non-empty": "a string",
+		"empty-string": "",
+		"one-value": 1,
+		"zero-value": 0,
+		"an-array": [],
+		"an-object": {},
+		"bool-true": true,
+		"bool-false": false,
+		// JSHint enforces double quotes,
+		// but JSON strings need double quotes to parse
+		// so we need escaped double quotes here
+		"some-json": "{ \"foo\": \"bar\" }"
+	};
+
+	keys = jQuery.map( datas, function( _, key ) {
+		return key;
+	});
+
+	// "keys" is an array that looks like this:
+	// [
+	//   "non-empty", "empty-string", "one-value", "zero-value",
+	//   "an-array", "an-object", "bool-true", "bool-false", "some-json"
+	//  ]
+
+	div.data( datas );
+	deepEqual( div.data(), datas, "div.data() returns an object whose values match those of datas (div)" );
+
+	div.removeData( keys.hyphen );
+	ok( jQuery.isEmptyObject( div.data() ), "After removal by array of hyphenated keys, div.data() returns an object with no properties (div)" );
+
+	div.data( "a-a", 1 );
+	div.data( "b-b", 2 );
+
+	deepEqual( div.data( "a-a" ), 1, "div.data('a-a') returns value that matches the manually set value (div)" );
+	deepEqual( div.data( "b-b" ), 2, "div.data('b-b') returns value that matches the manually set value (div)" );
+
+	div.removeData([ "a-a", "b-b" ]);
+
+	ok( jQuery.isEmptyObject( div.data() ), "After removal by array of hyphenated keys, div.data() returns an object with no properties (div)" );
+
+	plain = jQuery({});
+
+	plain.data( datas );
+	deepEqual( plain.data(), datas, "plain.data() returns an object whose values match those of datas (plain)" );
+
+	plain.removeData( keys );
+
+	ok( jQuery.isEmptyObject( plain.data() ), "After removal by array of hyphenated keys, plain.data() returns an object with no properties (plain)" );
+
+
+	plain = jQuery({});
+
+	plain.data( "a-a", 1 );
+	plain.data( "b-b", 2 );
+
+	deepEqual( plain.data( "a-a" ), 1, "plain.data('a-a') returns value that matches the manually set value (plain)" );
+	deepEqual( plain.data( "b-b" ), 2, "plain.data('b-b') returns value that matches the manually set value (plain)" );
+
+	plain.removeData([ "a-a", "b-b" ]);
+
+	ok( jQuery.isEmptyObject( plain.data() ), "After removal by array of hyphenated keys, plain.data() returns an object with no properties (plain)" );
+});
+
 // Test originally by Moschel
 test("Triggering the removeData should not throw exceptions. (#10080)", function() {
 	expect(1);