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<p>在 for-in 循环对象的属性时,使用中括号([])来访问属性的值:</p>
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<p id="demo"></p>
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<script>
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var myObj = {
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"name": "mifengjc",
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"alexa": 10000,
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"site": null
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};
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for (x in myObj) {
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document.getElementById("demo").innerHTML += myObj[x] + "<br>";
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}
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</script>