javascript - 如何在 JSON 中获取随机值

Question

我在 javascript 变量中有 json 字符串。我想从 JSON 字符串中获取随机值并设置为 HTML。

var jsonContent= {
          "featured": [
            {
              "id": "111",
              "title": "post title 111",
              "desc": "This is a test desc 111"
            },
            {
              "id": "222",
              "title": "post title 222",
              "desc": "This is a test desc 222"
            },
            {
              "id": "333",
              "title": "post title 333",
              "desc": "This is a test desc 333"
            }
    ]
};

例如，第一个键值分配给我的 html，如下所示：-

   <div class="r-v-details">
    <span class="r-v-title">post title 111</span>
    <span class="r-v-description">This is a test desc 222</span>
   </div>

如何从 JSON 字符串中获取随机键值？我是否需要将 JSON 解析为数组然后才能获得随机值？或者我只能通过 json 来实现？你能建议我吗？

Answer 1

它应该是：（在控制台中检查结果）

var jsonContent = {
        "featured": [
            {
                "id": "111",
                "title": "post title 111",
                "desc": "This is a test desc 111"
            },
            {
                "id": "222",
                "title": "post title 222",
                "desc": "This is a test desc 222"
            },
            {
                "id": "333",
                "title": "post title 333",
                "desc": "This is a test desc 333"
            }
        ]
    }

    var random = jsonContent.featured[Math.floor(Math.random() * jsonContent.featured.length)];
    console.log(random)

Answer 2

试试这个：

var random = jsonContent["featured"][Math.floor(Math.random()*jsonContent["featured"].length)];