​x
 
<!DOCTYPE html>
<html>
<body style="background-color:yellow;">
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<h1>HTML Style 对象</h1>
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<h2>backgroundColor 属性</h2>
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<p>背景颜色是：</p>
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<p id="demo"></p>
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<script>
let color = document.body.style.backgroundColor;
document.getElementById("demo").innerHTML = color;
</script>
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</body>
</html>
​