<!doctype html> <html lang=en> <meta charset=utf-8> <title>FormData: has</title> <script src="/resources/testharness.js"></script> <script src="/resources/testharnessreport.js"></script> <link rel="help" href="https://xhr.spec.whatwg.org/#dom-formdata-get" /> <link rel="help" href="https://xhr.spec.whatwg.org/#dom-formdata-getall" /> <div id="log"></div> <form id="form"> <input type="hidden" name="key" value="value1"> <input type="hidden" name="key" value="value2"> </form> <form id="empty-form" /> <script> test(function() { assert_equals(create_formdata(['key', 'value1'], ['key', 'value2']).has('key'), true); }, 'testFormDataHas'); test(function() { assert_equals(new FormData(document.getElementById('form')).has('key'), true); }, 'testFormDataHasFromForm'); test(function() { assert_equals(new FormData(document.getElementById('form')).has('nil'), false); }, 'testFormDataHasFromFormNull'); test(function() { assert_equals(new FormData(document.getElementById('empty-form')).has('key'), false); }, 'testFormDataHasFromEmptyForm'); test(function() { assert_equals(create_formdata(['key', 'value1'], ['key', 'value2']).has('nil'), false); }, 'testFormDataHasEmpty1'); test(function() { assert_equals(create_formdata().has('key'), false); }, 'testFormDataHasEmpty2'); function create_formdata() { var fd = new FormData(); for (var i = 0; i < arguments.length; i++) { fd.append.apply(fd, arguments[i]); }; return fd; } </script>