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57 lines
1.7 KiB
HTML
57 lines
1.7 KiB
HTML
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<html>
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<head>
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<title>Async JavaScript function test page</title>
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<style>
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.pass {
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background-color: green;
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}
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.fail {
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background-color: red;
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}
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</style>
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<script>
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responseText = "";
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async function loadFromURL(url) {
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let result = await new Promise((resolve, reject) => {
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const xhr = new XMLHttpRequest();
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xhr.open("GET", url);
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xhr.addEventListener("load", function () {
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if (this.status >= 200 && this.status <= 299)
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resolve(this.responseText);
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else
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reject();
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});
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xhr.addEventListener("error", () => reject());
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xhr.send();
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});
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responseText = result;
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document.getElementById("response-text").innerText = responseText;
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}
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async function testURL(url) {
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responseText = "";
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let shouldBeEmpty = false;
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try {
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await loadFromURL(url);
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} catch {
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shouldBeEmpty = true;
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}
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if ((responseText !== "") ^ shouldBeEmpty)
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document.getElementById("result").innerHTML = "<p class=pass>PASS!</p>";
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else
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document.getElementById("result").innerHTML = "<p class=fail>FAIL!</p>";
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}
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</script>
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</head>
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<body>
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<input id="url" type="text" value="http://man.serenityos.org/man4/zero.html">
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<a href="javascript:testURL(document.getElementById('url').value)">Click me for fun</a>
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<br>
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<div id="result"></div>
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<pre id="response-text"></pre>
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</body>
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</html>
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