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57 lines
2.5 KiB
HTML
57 lines
2.5 KiB
HTML
<!doctype html>
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<meta charset="utf-8">
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<title>18 native select option</title>
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<link rel="stylesheet" href="../_style.css">
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<script src="../_lib.js"></script>
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<body>
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<main>
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<p>Goal: select the option <code>banana</code> from the native <code><select></code>.
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Page asserts a real picker interaction: <code>mousedown</code>/<code>pointerdown</code>
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on the <select> (opening the OS picker), then a <code>change</code> event with
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<code>isTrusted=true</code>. Programmatically setting <code>.value</code> or clicking the
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option element directly fails (clicking <option> does not change selection in
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real browsers).</p>
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<select id="s" style="font-size:18px;padding:6px 10px">
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<option value="">— pick a fruit —</option>
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<option value="apple">apple</option>
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<option value="banana">banana</option>
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<option value="cherry">cherry</option>
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</select>
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</main>
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<script>
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Challenge.init({ id: "native-select", instructions: "pick 'banana' from native select" });
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const s = document.getElementById("s");
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let sawPointerDownOnSelect = false, pointerDownTrusted = false;
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s.addEventListener("pointerdown", (e) => { sawPointerDownOnSelect = true; pointerDownTrusted = e.isTrusted; });
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s.addEventListener("mousedown", (e) => { sawPointerDownOnSelect = true; pointerDownTrusted ||= e.isTrusted; });
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// Trap: if a click bubbles up from an <option>, that's bot-like (real OS pickers don't dispatch this).
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s.addEventListener("click", (e) => {
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if (e.target && e.target.tagName === "OPTION") {
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Challenge.fail("click event with target=<option> bubbled to <select> (synthetic option click)");
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}
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});
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let changeTrusted = false;
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s.addEventListener("change", (e) => {
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changeTrusted = e.isTrusted;
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Challenge.log("change", { v: s.value, isTrusted: e.isTrusted });
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if (s.value !== "banana") return Challenge.fail(`selected="${s.value}" (need 'banana')`);
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const bad = [];
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if (!changeTrusted) bad.push("change event isTrusted=false");
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if (!sawPointerDownOnSelect) bad.push("no pointerdown/mousedown on <select> before change");
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if (!pointerDownTrusted) bad.push("pointerdown on select isTrusted=false");
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if (bad.length) Challenge.fail(...bad);
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else Challenge.pass("native picker opened and trusted change fired");
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});
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// Also trip if value mutates without change firing.
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let changed = false;
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s.addEventListener("change", () => { changed = true; });
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setInterval(() => {
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if (s.value === "banana" && !changed) Challenge.fail("value='banana' without any change event");
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}, 200);
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</script>
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</body>
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