|  | <!doctype html> | 
|  | <html> | 
|  | <head> | 
|  | <meta charset="utf8"> | 
|  | <link rel="help" href="http://url.spec.whatwg.org/#dom-urlsearchparams-has"> | 
|  | <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'); | 
|  | assert_true(params.has('a')); | 
|  | assert_true(params.has('c')); | 
|  | assert_false(params.has('e')); | 
|  | params = new URLSearchParams('a=b&c=d&a=e'); | 
|  | assert_true(params.has('a')); | 
|  | params = new URLSearchParams('=b&c=d'); | 
|  | assert_true(params.has('')); | 
|  | params = new URLSearchParams('null=a'); | 
|  | assert_true(params.has(null)); | 
|  | }, 'Has basics'); | 
|  |  | 
|  | test(function() { | 
|  | var params = new URLSearchParams('a=b&c=d&&'); | 
|  | params.append('first', 1); | 
|  | params.append('first', 2); | 
|  | assert_true(params.has('a'), 'Search params object has name "a"'); | 
|  | assert_true(params.has('c'), 'Search params object has name "c"'); | 
|  | assert_true(params.has('first'), 'Search params object has name "first"'); | 
|  | assert_false(params.has('d'), 'Search params object has no name "d"'); | 
|  | params.delete('first'); | 
|  | assert_false(params.has('first'), 'Search params object has no name "first"'); | 
|  | }, 'has() following delete()'); | 
|  | </script> | 
|  | </head> | 
|  | </html> |