<!doctype html> <html lang=en> <meta charset=utf-8> <title>FormData: delete</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="form1"> <input type="hidden" name="key" value="value1"> <input type="hidden" name="key" value="value2"> </form> <form id="form2"> <input type="hidden" name="key1" value="value1"> <input type="hidden" name="key2" value="value2"> </form> <form id="empty-form" /> <script> test(function() { var fd = create_formdata(['key', 'value1'], ['key', 'value2']); fd.delete('key'); assert_equals(fd.get('key'), null); }, 'testFormDataDelete'); test(function() { var fd = new FormData(document.getElementById('form1')); fd.delete('key'); assert_equals(fd.get('key'), null); }, 'testFormDataDeleteFromForm'); test(function() { var fd = new FormData(document.getElementById('form1')); fd.delete('nil'); assert_equals(fd.get('key'), 'value1'); }, 'testFormDataDeleteFromFormNonExistentKey'); test(function() { var fd = new FormData(document.getElementById('form2')); fd.delete('key1'); assert_equals(fd.get('key1'), null); assert_equals(fd.get('key2'), 'value2'); }, 'testFormDataDeleteFromFormOtherKey'); test(function() { var fd = new FormData(document.getElementById('empty-form')); fd.delete('key'); assert_equals(fd.get('key'), null); }, 'testFormDataDeleteFromEmptyForm'); test(function() { var fd = create_formdata(['key', 'value1'], ['key', 'value2']); fd.delete('nil'); assert_equals(fd.get('key'), 'value1'); }, 'testFormDataDeleteNonExistentKey'); test(function() { var fd = create_formdata(['key1', 'value1'], ['key2', 'value2']); fd.delete('key1'); assert_equals(fd.get('key1'), null); assert_equals(fd.get('key2'), 'value2'); }, 'testFormDataDeleteOtherKey'); function create_formdata() { var fd = new FormData(); for (var i = 0; i < arguments.length; i++) { fd.append.apply(fd, arguments[i]); }; return fd; } </script>