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<!DOCTYPE html>
<html>
<body>
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<h1>JavaScript 字符串</h1>
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<h2>codePointAt() 方法</h2>
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<p>codePointAt() 返回字符串中指定位置的码位。</p>
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<p>获取最后位置的码位：</p>
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<p id="demo"></p>
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<script>
let text = "HELLO WORLD";
let code = text.charCodeAt(text.length-1);
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document.getElementById("demo").innerHTML = code;
</script>
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</body>
</html>
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