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<!DOCTYPE html>
<title>CSS Cascade Test: import conditions</title>
<link rel="help" href="https://www.w3.org/TR/css-cascade-5/#import-conditions">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#target { color: red; }
</style>
<style id="styleElement"></style>
<div id="target"></div>
<script>
const testCases = [
{
importCondition: "supports(display:block)",
matches: true
},
{
importCondition: "supports(foo:bar)",
matches: false
},
{
importCondition: "supports(display:block) (width >= 0px)",
matches: true
},
{
importCondition: "(width >= 0px) supports(foo:bar)",
matches: false
},
{
importCondition: "(width >= 0px) supports(display:block)",
matches: false
}
];
let styleElement = document.querySelector("#styleElement");
styleElement.remove();
for (let testCase of testCases) {
promise_test(async t => {
styleElement.innerText = "@import url(data:text/css,#target{color:green}) " + testCase.importCondition + ";";
await new Promise(resolve => {
styleElement.onload = resolve;
styleElement.onerror = resolve;
document.head.appendChild(styleElement);
});
try {
assert_equals(getComputedStyle(target).color, testCase.matches ? "rgb(0, 128, 0)" : "rgb(255, 0, 0)");
} finally {
styleElement.remove();
}
}, testCase.importCondition + " is " + (testCase.matches ? "" : "not ") + "a valid import condition");
}
</script>
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