Websocket 通过Socket.io更新React状态

我的React组件使用socket.io中的数据作为状态

我不确定在更新数据时如何只更新状态而不重新呈现整个组件

示例代码

var socket = io();

var data = {
  components: [{key: '',name: '',markup: ''}]
};


socket.on('data', function(_) {
  data = _;
});

var Components = React.createClass({
  displayName: "Components",

  getInitialState: function getInitialState() {
    return data;
  },

  handleChange: function handleChange() {
    this.setState(data);
  },

  render: function render() {
    /* render */
  }
});

ReactDOM.render(
  React.createElement(Components, {
    data: data
  }),
  document.getElementById('main')
);

---

您可以将套接字事件侦听器添加到

组件didmount

，如下所示

var socket = io();

var data = {
  components: [{key: '',name: '',markup: ''}]
};

var Components = React.createClass({
  displayName: "Components",

  componentDidMount: function () {
    socket.on('data', this.handleData);
  },

  componentWillUnmount: function () {
    socket.removeListener('data', this.handleData);
  },

  handleData: function (data) {
     this.setState(data);
  }, 

  getInitialState: function () {
    return data;
  },

  handleChange: function handleChange() {
    this.setState(data);
  },

  render: function render() {}
});