将React类移动到单独的文件中

Question

将React类移动到单独的文件中

完成React教程后,这是我的index.html文件:

<!-- index.html -->
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Hello React</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.3/react.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.13.3/JSXTransformer.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.2/marked.min.js"></script>
  </head>
  <body>
    <div id="content"></div>
    <script src="lib/main.js"></script>
  </body>
</html>

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这是我的src/main.jsx文件:

var CommentBox = React.createClass({
  getInitialState: function() {
    return {data: []};
  },
  loadCommentsFromServer: function() {
    $.ajax({
      url: this.props.url,
      dataType: 'json',
      cache: false,
      success: function(data) {
        this.setState({data: data});
      }.bind(this),
      error: function(xhr, status, err) {
        console.error(this.props.url, status, err.toString());
      }.bind(this)
    });
  },
  handleCommentSubmit: function(comment) {
    var comments = this.state.data;
    var newComments = comments.concat([comment]);
    this.setState({data: newComments});

    $.ajax({
      url: this.props.url,
      dataType: 'json',
      type: 'POST',
      data: comment,
      success: function(data) {
        this.setState({data: data});
      }.bind(this),
      error: function(xhr, status, err) {
        console.error(this.props.url, status, err.toString());
      }.bind(this)
    });
  },
  componentDidMount: function() {
    this.loadCommentsFromServer();
    setInterval(this.loadCommentsFromServer, this.props.pollInterval);
  },
  render: function() {
    return (
      <div className="commentBox">
        <h1>Comments Yo</h1>
        <CommentForm onCommentSubmit={this.handleCommentSubmit} />
        <CommentList data={this.state.data} />
      </div>
    );
  }
});

var CommentForm = React.createClass({
  handleSubmit: function(e) {
    e.preventDefault();
    var author = React.findDOMNode(this.refs.author).value.trim();
    var text = React.findDOMNode(this.refs.text).value.trim();
    if (!text || !author) {
      return;
    }

    // send request to the server
    this.props.onCommentSubmit({author: author, text: text});
    React.findDOMNode(this.refs.author).value = '';
    React.findDOMNode(this.refs.text).value = '';
    return;
  },
  render: function() {
    return (
      <form className="commentForm" onSubmit={this.handleSubmit}>
        <input type="text" placeholder="Your name" ref="author" />
        <input type="text" placeholder="Say something..." ref="text" />
        <input type="submit" value="Post" />
      </form>
    );
  }
});

var CommentList = React.createClass({
  render: function() {
    var commentNodes = this.props.data.map(function (comment) {
      return (
        <Comment author={comment.author}>
          {comment.text}
        </Comment>
      );
    });
    commentNodes.reverse();
    return (
      <div className="commentList">
        {commentNodes}
      </div>
    );
  }
});

var Comment = React.createClass({
  render: function() {
    var rawMarkup = marked(this.props.children.toString(), {sanitize: true});
    return (
      <div className="comment">
        <h2 className="commentAuthor">
          {this.props.author}
        </h2>
        <span dangerouslySetInnerHTML={{__html: rawMarkup}} />
        <hr />
      </div>
    );
  }
});

React.render(
  <CommentBox url="comments.json" pollInterval={2000} />,
  document.getElementById('content')
);

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另外,我正在运行此命令将我的jsx转换为js:

babel --watch src/ --out-dir lib/

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我想将每个React类移动到自己的文件中.例如,我想创建以下四个文件(注意:每个映射到我的main.jsx文件中的顶级"var"声明)并将所有这些类拉入我的main.jsx文件中:

comment.jsx
commentList.jsx
commentForm.jsx
commentBox.jsx

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我该怎么做呢？

在这里敲了一下require和es6一段时间之后,我仍然没有很好的直觉知道如何将所有这些分开,或者如果需要/ es6这样的东西甚至是接近它的正确方法.

谢谢您的帮助!

Answer 1

Hem*_*lle 33

在使用create-react-app工具创建的项目中,分离组件似乎可以正常工作.在文件中定义组件Hello.jsx:

import React from 'react';

var Hello = React.createClass({
  render: function() {
    return (
      <p>Hello world!</p>
    );
  }
});

// Must export!
export default Hello;

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然后你可以用另一个文件导入组件

import Hello from './Hello.jsx'

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应该是接受的答案.简短,简单,不使用额外的铃铛和口哨. (3认同)
“出口默认类MyClass扩展了组件{...}”对我有用，而没有任何其他变量。 (2认同)

Answer 2

dre*_*cat 30

如果你想为每个React类创建一个文件,我建议你看看webpack.您可以将React类开发为CommonJs模块,并将它们捆绑在一起.

此外,我认为这是一个很好的选择,因为你想使用babel来转换你的jsx文件.这是通过webpack加载器解决的.

基本的webpack配置文件将包含以下内容:

webpack.config.js

var webpack = require('webpack');

module.exports = {
  entry: './src/main.jsx',
  output: {
    // Output the bundled file.
    path: './lib',
    // Use the name specified in the entry key as name for the bundle file.
    filename: 'main.js'
  },
  module: {
    loaders: [
      {
        // Test for js or jsx files.
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: 'babel'
      }
    ]
  },
  externals: {
    // Don't bundle the 'react' npm package with the component.
    'react': 'React' 
  },
  resolve: {
    // Include empty string '' to resolve files by their explicit extension
    // (e.g. require('./somefile.ext')).
    // Include '.js', '.jsx' to resolve files by these implicit extensions
    // (e.g. require('underscore')).
    extensions: ['', '.js', '.jsx']
  }
};

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如果你想拥有实际的代码,我创建了一个GitHub react-tutorial-webpack存储库.

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