File: select-tabindex-order.tentative.html

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<!DOCTYPE html>
<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>

<input id="input1">
<select id="select" tabindex="2">
  <option>one</option>
  <option>two</option>
  <option>three</option>
</select>
<input id="input3" tabindex="1">

<style>
  select, ::picker(select) {
    appearance: base-select;
  }
</style>

<script>
promise_test(async () => {
  const TAB_KEY = "\uE004";

  const input1 = document.getElementById("input1");
  const input3 = document.getElementById("input3");

  input1.focus();
  assert_equals(document.activeElement.id, "input1", "input1 should be active");

  await test_driver.send_keys(input1, TAB_KEY);
  assert_equals(document.activeElement.id, "input3", "input3 should be active");

  await test_driver.send_keys(input3, TAB_KEY);
  assert_equals(document.activeElement.id, "select", "select should be active");
}, "Check that tabindex applies to <select>");
</script>