​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>Document 对象</h1>
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<h2>defaultView 属性</h2>
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<p>defaultView 属性返回当前窗口对象。</p>
​
<p>窗口的宽度和高度为：</p>
​
<p id="demo"></p>
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<script>
const view = document.defaultView;
let width = view.innerWidth;
let height = view.innerHeight;
document.getElementById("demo").innerHTML = width + "x" + height;
</script>
​
</body>
</html>
​