| <!doctype html> | 
 | <html> | 
 | <head> | 
 | <meta charset="utf8"> | 
 | <link rel="help" href="http://url.spec.whatwg.org/#dom-urlsearchparams-delete"> | 
 | <script src="/resources/testharness.js"></script> | 
 | <script src="/resources/testharnessreport.js"></script> | 
 | <script src="resources/testharness-extras.js"></script> | 
 | <script> | 
 | test(function() { | 
 |     var params = new URLSearchParams('a=b&c=d'); | 
 |     params.delete('a'); | 
 |     assert_equals(params + '', 'c=d'); | 
 |     params = new URLSearchParams('a=a&b=b&a=a&c=c'); | 
 |     params.delete('a'); | 
 |     assert_equals(params + '', 'b=b&c=c'); | 
 |     params = new URLSearchParams('a=a&=&b=b&c=c'); | 
 |     params.delete(''); | 
 |     assert_equals(params + '', 'a=a&b=b&c=c'); | 
 |     params = new URLSearchParams('a=a&null=null&b=b'); | 
 |     params.delete(null); | 
 |     assert_equals(params + '', 'a=a&b=b'); | 
 |     params = new URLSearchParams('a=a&undefined=undefined&b=b'); | 
 |     params.delete(undefined); | 
 |     assert_equals(params + '', 'a=a&b=b'); | 
 | }, 'Delete basics'); | 
 |  | 
 | test(function() { | 
 |     var params = new URLSearchParams(); | 
 |     params.append('first', 1); | 
 |     assert_true(params.has('first'), 'Search params object has name "first"'); | 
 |     assert_equals(params.get('first'), '1', 'Search params object has name "first" with value "1"'); | 
 |     params.delete('first'); | 
 |     assert_false(params.has('first'), 'Search params object has no "first" name'); | 
 |     params.append('first', 1); | 
 |     params.append('first', 10); | 
 |     params.delete('first'); | 
 |     assert_false(params.has('first'), 'Search params object has no "first" name'); | 
 | }, 'Deleting appended multiple'); | 
 | </script> | 
 | </head> | 
 | </html> |