selectlist-required-attribute.tentative.html

Enable keyboard shortcuts

This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/semantics/forms/the-selectlist-element/selectlist-required-attribute.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html lang="en">

<title>HTMLSelectListElement Test: required attribute</title>

<link rel="author" title="Ionel Popescu" href="mailto:iopopesc@microsoft.com">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<style>

  selectlist:required {

    border: 3px dashed rgb(255, 0, 0);

  selectlist:optional {

    border: 1px solid rgb(128, 128, 128);

</style>

<selectlist id="selectlist0" required>

  <option>one</option>

  <option>two</option>

  <option>three</option>

</selectlist>

<selectlist id="selectlist1">

  <option>one</option>

  <option>two</option>

  <option>three</option>

</selectlist>

<selectlist id="selectlist2">

  <option>one</option>

  <option>two</option>

  <option>three</option>

</selectlist>

<script>

function checkRequired(style) {

  assert_equals(style.borderWidth, '3px');

  assert_equals(style.borderStyle, 'dashed');

  assert_equals(style.borderColor, 'rgb(255, 0, 0)');

function checkOptional(style) {

  assert_equals(style.borderWidth, '1px');

  assert_equals(style.borderStyle, 'solid');

  assert_equals(style.borderColor, 'rgb(128, 128, 128)');

test(() => {

  const selectList0 = document.getElementById("selectlist0");

  const selectList1 = document.getElementById("selectlist1");

  const selectList2 = document.getElementById("selectlist2");

  checkRequired(window.getComputedStyle(selectList0));

  checkOptional(window.getComputedStyle(selectList1));

  checkOptional(window.getComputedStyle(selectList2));

  selectList2.required = true;

  checkRequired(window.getComputedStyle(selectList2));

}, "Test required attribute");

</script>