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<!DOCTYPE html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Test focus is moved to the previously focused element when dialog is closed</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<body>
<input />
<dialog>
<button id="button1">This is a button1</button>
<button id="button2">This is a button2</button>
<button id="button3">This is a button3</button>
</dialog>
<script>
// Test focus is moved to the previously focused element
function test_move_to_previously_focused(showModal) {
const input = document.querySelector("input");
input.focus();
const dialog = document.querySelector("dialog");
if (showModal) {
dialog.showModal();
} else {
dialog.show();
}
dialog.close();
assert_equals(document.activeElement, input);
}
// Test focus is moved to the previously focused element with some complex dialog usage
async function test_move_to_previously_focused_with_complex_dialog_usage(showModal) {
const input = document.querySelector("input");
input.focus();
const dialog = document.querySelector("dialog");
if (showModal) {
dialog.showModal();
} else {
dialog.show();
}
const button1 = document.getElementById("button1");
const button2 = document.getElementById("button2");
const button3 = document.getElementById("button3");
await test_driver.click(button1);
await test_driver.click(button2);
await test_driver.click(button3);
dialog.close();
assert_equals(document.activeElement, input);
}
// Test focus is moved to the previously focused element even if that element moved in between
function test_element_move_in_between_show_close(showModal) {
const input = document.querySelector("input");
input.focus();
const dialog = document.querySelector("dialog");
assert_equals(input.nextElementSibling, dialog, "Element is in correct position");
if (showModal) {
dialog.showModal();
} else {
dialog.show();
}
document.body.appendChild(input);
assert_not_equals(input.nextElementSibling, dialog, "Element should have moved");
dialog.close();
assert_equals(document.activeElement, input, "Focus should be restored to previously focused input");
// Clean up
document.body.insertBefore(input, dialog);
}
// Test focus is moved to the previously focused element even if that element moved to shadow root in between
function test_element_move_to_shadow_root_in_between_show_close(showModal) {
const input = document.querySelector("input");
input.focus();
const dialog = document.querySelector("dialog");
assert_equals(input.nextElementSibling, dialog, "Element is in correct position");
if (showModal) {
dialog.showModal();
} else {
dialog.show();
}
const shadowHost = document.createElement("div");
const shadowRoot = shadowHost.attachShadow({mode: "open"});
shadowRoot.appendChild(input);
document.body.appendChild(shadowHost);
assert_not_equals(input.nextElementSibling, dialog, "Element should have moved");
dialog.close();
assert_equals(shadowRoot.activeElement, input, "Focus should be restored to previously focused input");
assert_equals(document.activeElement, shadowHost, "document.activeElement should be previously focused input's shadow DOM host");
// Clean up
document.body.insertBefore(input, dialog);
shadowHost.remove();
}
// Test focus is moved to <body> if the previously focused
// element can't be focused
function test_move_to_body_if_fails(showModal) {
const input = document.querySelector("input");
input.focus();
const dialog = document.querySelector("dialog");
if (showModal) {
dialog.showModal();
} else {
dialog.show();
}
dialog.close();
input.remove();
assert_equals(document.activeElement, document.body);
// Clean up
document.body.insertBefore(input, dialog);
}
// Test focus is moved to shadow host if the previously
// focused element is a shadow node.
function test_move_to_shadow_host(showModal) {
const shadowHost = document.createElement("div");
const shadowRoot = shadowHost.attachShadow({mode: "open"});
shadowRoot.appendChild(document.createElement("input"));
document.body.appendChild(shadowHost);
const inputElement = shadowRoot.querySelector("input");
inputElement.focus();
assert_equals(document.activeElement, shadowHost);
assert_equals(shadowRoot.activeElement, inputElement);
const dialog = document.querySelector("dialog");
if (showModal) {
dialog.showModal();
} else {
dialog.show();
}
dialog.close();
assert_equals(document.activeElement, shadowHost);
assert_equals(shadowRoot.activeElement, inputElement);
// Clean up
shadowHost.remove();
}
// Test moving the focus doesn't scroll the viewport
async function test_move_focus_dont_scroll_viewport(showModal) {
const outViewPortButton = document.createElement("button");
outViewPortButton.style.top = (window.innerHeight + 10).toString() + "px";
outViewPortButton.style.position = "absolute";
document.body.appendChild(outViewPortButton);
await new Promise(resolve => {
document.addEventListener("scroll", () => {
if (resolve && document.documentElement.scrollTop) {
resolve();
resolve = null;
}
});
outViewPortButton.focus();
});
// Since the outViewPortButton is focused, so the viewport should be
// scrolled to it
assert_true(document.documentElement.scrollTop > 0 );
const dialog = document.querySelector("dialog");
if (showModal) {
dialog.showModal();
} else {
dialog.show();
}
window.scrollTo(0, 0);
assert_equals(document.documentElement.scrollTop, 0);
dialog.close();
assert_equals(document.documentElement.scrollTop, 0);
assert_equals(document.activeElement, outViewPortButton);
}
test(() => {
test_move_to_previously_focused(true);
test_move_to_previously_focused(false);
}, "Focus should be moved to the previously focused element (Simple dialog usage)");
promise_test(async () => {
await test_move_to_previously_focused_with_complex_dialog_usage(true);
await test_move_to_previously_focused_with_complex_dialog_usage(false);
}, "Focus should be moved to the previously focused element (Complex dialog usage)");
test(() => {
test_element_move_in_between_show_close(true);
test_element_move_in_between_show_close(false);
}, "Focus should be moved to the previously focused element even if it has moved in between show/close");
test(() => {
test_element_move_to_shadow_root_in_between_show_close(true);
test_element_move_to_shadow_root_in_between_show_close(false);
}, "Focus should be moved to the previously focused element even if it has moved to shadow DOM root in between show/close");
test(() => {
test_move_to_body_if_fails(true);
test_move_to_body_if_fails(false);
}, "Focus should be moved to the body if the previously focused element is removed");
test(() => {
test_move_to_shadow_host(true);
test_move_to_shadow_host(false);
}, "Focus should be moved to the shadow DOM host if the previouly focused element is a shadow DOM node");
promise_test(async () => {
await test_move_focus_dont_scroll_viewport(true);
await test_move_focus_dont_scroll_viewport(false);
}, "Focus should not scroll if the previously focused element is outside the viewport");
</script>
</body>
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