|  | <!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> |