File: textarea-textLength.html

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<!DOCTYPE HTML>
<title>The textLengh IDL attribute</title>
<meta content="charset=utf-16">
<link rel="author" title="tigercosmos" href="mailto:phy.tiger@gmail.com">
<link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-textarea-textlength">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<textarea id="textarea"></textarea>
<script>
    var textarea = document.getElementById("textarea");

    test(function () {
        textarea.value= "Hello, World!";
        assert_equals(textarea.textLength, 13);

        textarea.value = "\u4f60\u597d\uff0c\u4e16\u754c\uff01"; //你好，世界!
        assert_equals(textarea.textLength, 6);
    }, "Textarea's 'testLength' should work for utf-16.");
</script>