Make elements with toggle-trigger be focusable.
Support for toggles is controlled by the CSSToggles flag (currently off)
in RuntimeEnabledFeatures.
Bug: 1250716
Change-Id: Iffd1737b09147ede237c831ce8dc1766dd993fec
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4006376
Reviewed-by: Joey Arhar <jarhar@chromium.org>
Commit-Queue: David Baron <dbaron@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1067746}
diff --git a/css/css-toggle/toggle-trigger-focus.tentative.html b/css/css-toggle/toggle-trigger-focus.tentative.html
new file mode 100644
index 0000000..bc93ba3
--- /dev/null
+++ b/css/css-toggle/toggle-trigger-focus.tentative.html
@@ -0,0 +1,54 @@
+<!DOCTYPE HTML>
+<meta charset="UTF-8">
+<title>CSS Toggles: focusability of elements with toggle-trigger</title>
+<link rel="author" title="L. David Baron" href="https://dbaron.org/">
+<link rel="author" title="Google" href="http://www.google.com/">
+<link rel="help" href="https://tabatkins.github.io/css-toggle/#toggle-trigger-property">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="support/toggle-helpers.js"></script>
+
+<div id="test"></div>
+
+<script>
+
+// From shadow-dom/focus/resources/shadow-utils.js
+function navigateFocusForward() {
+ // TAB = '\ue004'
+ return test_driver.send_keys(document.body, "\ue004");
+}
+
+let container = document.getElementById("test");
+
+promise_test(async test => {
+ container.innerHTML = `
+ <input id="input" type="text">
+ <div id="e1" style="toggle-root: tab"></div>
+ <div id="e2" style="toggle-trigger: tab"></div>
+ <div id="e3" style="toggle-trigger: tab"></div>
+ <div id="e4" style="toggle-trigger: nonexistent"></div>
+ `;
+
+ let input = document.getElementById("input");
+ let e1 = document.getElementById("e1");
+ let e2 = document.getElementById("e2");
+ let e3 = document.getElementById("e3");
+ let e4 = document.getElementById("e4");
+
+ await wait_for_toggle_creation(e1);
+ input.focus();
+ assert_equals(document.activeElement, input);
+
+ await navigateFocusForward();
+ assert_equals(document.activeElement, e2);
+
+ await navigateFocusForward();
+ assert_equals(document.activeElement, e3);
+
+ await navigateFocusForward();
+ assert_equals(document.activeElement, e4);
+}, "elements with toggle-trigger are tabbable");
+
+</script>
