反应ES6 |子组件未呈现

时间:2015-04-16 07:55:30

标签: javascript reactjs babeljs

我正在尝试使用React从firebase渲染数组。我有一个Container视图,它从firebase获取数据,并将数据传递给子组件。这是代码:

Container.jsx

import React from 'react'
import Firebase from 'firebase'
import loadsTable from './loadstable'

class Container extends React.Component{
    constructor(props){
        super(props)
        this.loads = [];
        this.state = {loads:[]}
    }
    render(){
        console.log("render" , this.state.loads)
        return( <div>
                    <loadsTable loads={this.state.loads}/>
                </div>
        )
    }
    componentWillMount(){
        this.firebaseRef = new Firebase("https://***.firebaseio.com/loads");
        this.firebaseRef.on("child_added", function(dataSnapshot) {
            console.log(dataSnapshot.val())
            this.loads.push(dataSnapshot.val());
            this.setState({
              loads: this.loads
            });
        }.bind(this));
    }
}

React.render(<Container/> , document.getElementById('app'))

这成功获取数据(加载),console.logs也一样。

以下是子组件的代码:

LoadsTable.jsx

import React from 'react'

class loadsTable extends React.Component{

    constructor(props){
        super(props)
        console.log("init loadsTable");
        this.state = {loads:this.props.loads}
    }

    render(){
        console.log("this.state.loads " , this.props.loads);
        console.log("this.state.loads " , this.state.loads);
        var loads = this.props.loads.map(function(load, index){
            console.log("load " , load)
            return <tr><td>{load.load_number}</td></tr>
        });
        return(
            <div className="col-md-7">
                <table className="table table-hover table-bordered table-striped loads">
                    <tbody>
                        {loads}
                    </tbody>
                </table>
            </div>
        )
    }
}

export default loadsTable

这里的问题是没有任何东西被渲染,实际上,构造函数中的console.log永远不会被调用。如果我在Container构造函数中调用LoadsTable,我得到:

Chrome开发者控制台输出

function loadsTable(props) {
    _classCallCheck(this, loadsTable);

    _get(Object.getPrototypeOf(loadsTable.prototype), "constructor", this).call(this, props);
    console.log("init loadsTable");
    this.state = { loads: this.props.loads };
}

所以,我的问题是:有没有人知道我在这里做错了什么以及为什么没有实例化LoadsTable?

我正在使用Gulp来构建和传播ES6。

对此的任何帮助都将非常感激。提前谢谢。

1 个答案:

答案 0 :(得分:2)

组件名称必须大写。所以它应该是

import LoadsTable from ...;

<LoadsTable ... /> 

代替。

请参阅https://facebook.github.io/react/docs/jsx-in-depth.html#html-tags-vs.-react-components