javascript 如何在 JSON 中获取随机值
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How to get random values in JSON
提问by prakashapkota
I have json string in javascript variable . I want to get random value from JSON string and set into HTML.
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"
}
]
};
for e.g first key value assign to my html like this:-
例如，像这样分配给我的 html 的第一个键值：-
<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>
How can I get random key values from JSON string? Does I need to parse JSON into array then I can get random value? or I can achieve this by json only? Can you please suggest me.
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。
回答by Vicky Gonsalves
It should be: (check result in console)
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)
回答by prakashapkota
Try this:
试试这个：
var random = jsonContent["featured"][Math.floor(Math.random()*jsonContent["featured"].length)];
