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<!DOCTYPE html>
<html lang="en">
<title>HTMLselectElement 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>
select:required {
border: 3px dashed rgb(255, 0, 0);
}
select:optional {
border: 1px solid rgb(128, 128, 128);
}
select, ::picker(select) {
appearance: base-select;
}
</style>
<select id="select0" required>
<option>one</option>
<option>two</option>
<option>three</option>
</select>
<select id="select1">
<option>one</option>
<option>two</option>
<option>three</option>
</select>
<select id="select2">
<option>one</option>
<option>two</option>
<option>three</option>
</select>
<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 select0 = document.getElementById("select0");
const select1 = document.getElementById("select1");
const select2 = document.getElementById("select2");
checkRequired(window.getComputedStyle(select0));
checkOptional(window.getComputedStyle(select1));
checkOptional(window.getComputedStyle(select2));
select2.required = true;
checkRequired(window.getComputedStyle(select2));
}, "Test required attribute");
</script>
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