link-preload-unused.html | Explore in Territory

<!DOCTYPE html>
<script>
    if (window.testRunner) {
        testRunner.waitUntilDone();
        testRunner.dumpAsText();
    }
    window.setTimeout(function() {
        if (window.testRunner) {
            testRunner.notifyDone();
        }
    }, 4000);
</script>
<link rel="preload" as="image" href="resources/nick.jpg">
<link rel="preload" as="image" href="resources/nick.jpg?name=value">
<img src="resources/nick.jpg">
This test verifies that unused preload resources (and only unused ones) issue a warning.

chromium/third_party/blink/web_tests/fast/dom/HTMLLinkElement/link-preload-unused.html