将 socket.io 数据传递给 vuejs [英] Passing socket.io data to vuejs

问题描述

我在将 socket.io 数据传递给 vuejs 元素时遇到问题.我浏览了几次 Vue 文档，但找不到解决方案.基本上，我有一个通过 socket.io 发送到客户端的数据，console.log 完美地打印了它.现在我想使用 Vue 来渲染带有该数据的 html 元素，但是我在将 socket.io 数据传递给它时遇到了问题.

在 Vue 文档中有一个示例，说明如何使用静态数据输入进行操作.

var example1 = new Vue({el: '#example-1',数据: {项目: [{消息:'Foo'}，{消息:'酒吧'}]}})

所以我发现我需要将我的数据对象转换为字符串.我为此使用了 JSON.stringify().

var socket = io.connect('http://192.168.1.10');socket.on('posts', 函数 (datasocket) {var st = JSON.stringify(datasocket);var blogposts = new Vue({el: '#blogpost',数据: {物品:st}})});

和 HTML

 
<div v-for="item in items" class="card" style="width: 20rem;"><div class="card-block"><h4 class="card-title">{{ item.post_title }}</h4><p class="card-text">{{ item.post_excerpt }}</p><a href="{{ item.post_link }}" class="btn btn-primary">去某处</a>

然而，Vue 似乎没有渲染任何东西.在我的控制台中，当我在 st 上执行 console.log 时，我得到输出:

{"content":[{"post_title":"帖子标题 1","post_excerpt":"帖子摘录 1","post_link":"/post/1"},{"post_title":"帖子标题 2","post_excerpt":"帖子摘录 2","post_link":"/post/2"},{"post_title":"帖子标题 3","post_excerpt":"帖子摘录 2","post_link":"/post/3"}]}

那么知道如何正确地将这些数据传递给 VueJS 吗?

解决方案

您应该将套接字连接放入生命周期钩子之一 - 对于您的情况 mounted() 应该可以工作.

 var socket = io.connect('http://192.168.1.10');var blogposts = new Vue({el: '#blogpost',数据: {项目: []},安装:功能(){socket.on('posts', function(datasocket) {this.items.push(datasocket.content)}.bind(this))}})

注意:如果使用箭头语法，则不必绑定this

挂载:function() {socket.on('posts', datasocket => {this.items.push(datasocket.content)})}

顺便说一句:我认为你不需要使用 JSON.stringify

I have an issue with passing socket.io data to vuejs element. I went through Vue documentation few times and I couldn't find solution for this. Basically, I have a data that's being sent to client via socket.io and console.log prints it perfectly. Now I wanted to use Vue to render html elements with that data, however I have an issue with passing my socket.io data to it.

In Vue documentation there's an example how to do it with static data input.

var example1 = new Vue({
  el: '#example-1',
  data: {
    items: [
      { message: 'Foo' },
      { message: 'Bar' }
    ]
  }
})

So I figured out that I need to convert my data object to string for this. I used JSON.stringify() for this.

var socket = io.connect('http://192.168.1.10');
socket.on('posts', function (datasocket) {
  var st = JSON.stringify(datasocket);
  var blogposts = new Vue({
    el: '#blogpost',
    data: {
      items: st
    }
  })
});

And HTML

  <div id="blogpost">
    <div v-for="item in items" class="card" style="width: 20rem;">
      <div class="card-block">
        <h4 class="card-title">{{ item.post_title }}</h4>
        <p class="card-text">{{ item.post_excerpt }}</p>
        <a href="{{ item.post_link }}" class="btn btn-primary">Go somewhere</a>
      </div>
    </div>
  </div>

However, Vue doesn't seem to render anything. In my console when I do console.log on st, I get output:

{"content":[{"post_title":"Post title 1","post_excerpt":"Post excerpt 1","post_link":"/post/1"},{"post_title":"Post title 2","post_excerpt":"Post excerpt 2","post_link":"/post/2"},{"post_title":"Post title 3","post_excerpt":"Post excerpt 2","post_link":"/post/3"}]}

So any idea how to correctly pass this data to VueJS?

解决方案

You should put your socket connection into one of the lifecycle hook - for your case mounted() should work.

    var socket = io.connect('http://192.168.1.10');
    var blogposts = new Vue({
        el: '#blogpost',
        data: {
          items: []
        },
        mounted: function() {
          socket.on('posts', function(datasocket) {
            this.items.push(datasocket.content)
          }.bind(this))
        }

    })

Note: If you use arrow syntax, then you don't have to bind this

mounted: function() {
   socket.on('posts', datasocket => {
     this.items.push(datasocket.content)
   })
}

Btw: I don't think you need to use JSON.stringify

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