案例:JSON案例     状态:可编辑再运行    进入竖版
 运行结果 
x
 
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>W3xue教程(w3xue.com)</title>
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</head>
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<body>
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<p>使用中括号([])来修改 JSON 对象的值。</p>
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<p id="demo"></p>
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<script>
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var myObj, i, x = "";
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myObj = {
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    "name":"W3xue",
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    "alexa":10000,
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    "sites": {
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        "site1":"www.w3xue.com",
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        "site2":"m.w3xue.com",
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        "site3":"c.w3xue.com"
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    }
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}
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myObj.sites["site1"] = "www.google.com";
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for (i in myObj.sites) {
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    x += myObj.sites[i] + "<br>";
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}
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document.getElementById("demo").innerHTML = x;
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</script>
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</body>
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</html>