我们可以使用 for-in 来循环访问每个数组 - 在线编辑器

          <p>循环内嵌数组：</p>

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

<script>
  var myObj, i, j, x = "";
  myObj = {
    "name": "网站",
    "num": 3,
    "sites": [{
        "name": "Google",
        "info": ["Android", "Google 搜索", "Google 翻译"]
      },
      {
        "name": "Mifengjc",
        "info": ["蜜蜂教程", "菜鸟工具", "菜鸟微信"]
      },
      {
        "name": "Taobao",
        "info": ["淘宝", "网购"]
      }
    ]
  }
  for (i in myObj.sites) {
    x += "<h1>" + myObj.sites[i].name + "</h1>";
    for (j in myObj.sites[i].info) {
      x += myObj.sites[i].info[j] + "<br>";
    }
  }
  document.getElementById("demo").innerHTML = x;
</script>
        