| <!DOCTYPE html> |
| <title>preventDefault during activation behavior</title> |
| <link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1197032"> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/C#the-button-element"> |
| <link rel="help" href="https://dom.spec.whatwg.org/#dispatching-events"> |
| <link rel="author" title="L. David Baron" href="https://dbaron.org/"> |
| <link rel="author" title="Google" href="http://www.google.com/"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <body> |
| |
| <form id="f"> |
| <input type="submit" id="b"> |
| </form> |
| |
| <script> |
| |
| promise_test(async () => { |
| let form = document.getElementById("f"); |
| let button = document.getElementById("b"); |
| |
| let cached_event; |
| let submit_fired = false; |
| |
| let click_promise = new Promise((resolve, reject) => { |
| button.addEventListener("click", event => { |
| assert_false(submit_fired); |
| cached_event = event; |
| resolve(); |
| }); |
| }); |
| |
| form.addEventListener("submit", event => { |
| assert_false(submit_fired); |
| assert_true(!!cached_event, "click should have fired"); |
| |
| // Call preventDefault on the click event during its activation |
| // behavior, to test the bug that we're trying to test. |
| cached_event.preventDefault(); |
| |
| // prevent the form submission from navigating the page |
| event.preventDefault(); |
| |
| submit_fired = true; |
| }); |
| |
| assert_false(submit_fired); |
| button.click(); |
| await click_promise; |
| assert_true(submit_fired); |
| }, "behavior of preventDefault during activation behavior"); |
| |
| </script> |