我们可以使用 delete 关键字来删除 JSON 对象的属性

<p>删除 JSON 对象属性。</p>

​

<p id="demo"></p>

​

<script>

  var myObj, i, x = "";

  myObj = {

    "name": "mifengjc",

    "alexa": 10000,

    "sites": {

      "site1": "www.mifengjc.com",

      "site2": "m.mifengjc.com",

      "site3": "c.mifengjc.com"

    }

  }

  delete myObj.sites.site1;

  for (i in myObj.sites) {

    x += myObj.sites[i] + "<br>";

  }

  document.getElementById("demo").innerHTML = x;

</script>