javascript - ReactJs 聚合来自组件的数据

Question

将一个大组件拆分为多个较小组件并聚合它们的数据的最佳方法是什么？我想在 FormComponent 中访问 BillingDataComponent、NameComponent 和 AddressComponent 的状态。

例子：

var FormComponent = React.createClass({
  _onClick: function() {
    // Access child data here
    var name = ???
    var address = ???
    var billingData = ???

    ActionCreator.updateFormDataOnServer(formDataAggregatedFromChildren);
  },

  render: function() {
    return (
      <div>
        <form>
          <NameComponent name="Maybe the name is already set?" />
          <AddressComponent />
          <BillingDataComponent />
          <button onClick={this._onClick} >Submit</button>
        </form>
      <div>
    );
  }
});

var NameComponent = React.createClass({  
  _onChange: function(e) {
    this.setState({
      value: e.target.value
    });
  },

  render: function() {
    return (
      <div>
        <input type="text" value={this.state.value} onChange={this._onChange} />
      </div>
    );
  }
});

// AddressComponent and BillingDataComponent similiar

Answer 1

您应该让FormComponent自己拥有数据并将其作为道具传递给其他组件。当数据发生变化时，孩子们应该将变化传播到表单：

var FormComponent = React.createClass({
  getInitialState: function() {
    return {
      name: ""
    };
  },

  _onClick: function() {
    // Access child data here
    var name = ???
    var address = ???
    var billingData = ???

    ActionCreator.updateFormDataOnServer(formDataAggregatedFromChildren);
  },

  _onNameChange: function(name) {
    this.setState({
      name: name
    });
  },

  render: function() {
    return (
      <div>
        <form>
          <NameComponent onChange={this._onNameChange} value={this.state.name} />
          <AddressComponent />
          <BillingDataComponent />
          <button onClick={this._onClick} >Submit</button>
        </form>
      <div>
    );
  }
});

var NameComponent = React.createClass({  
  _onChange: function(e) {
    this.props.onChange(e.target.value);
  },

  render: function() {
    return (
      <div>
        <input type="text" value={this.props.value} onChange={this._onChange} />
      </div>
    );
  }
});

// AddressComponent and BillingDataComponent similiar