ReactJs CreateClass不是一个函数

Question

var React = require('react');

module.exports=React.createClass({
   render:function(){
   return(
        <div>
           <h1> the list  </h1>
        </div>   
   )}
})

当我运行上面的代码时,我收到以下错误:

app.js:4 Uncaught TypeError: React.createClass is not a function

这是因为版本差异还是拼写错误？

package.json-I have included create-react-class as seen here but not in the bower.json file 


 {
    "dependencies": {
        "browser-sync": "^2.18.13",
        "browserify": "^14.4.0",
        "create-react-class": "^15.6.2",
        "ejs": "^2.5.7",
        "express": "^4.16.0",
        "gulp": "^3.9.1",
        "gulp-live-server": "0.0.31",
        "react": "^16.0.0",
        "reactify": "^1.1.1",
        "vinyl-source-stream": "^1.1.0"
      }
    }

gulpfile.js -Am我在这个文件中遗漏了一些依赖项

var gulp= require('gulp');
var LiveServer= require('gulp-live-server');
var browserSync=require('browser-sync');
var browserify = require('browserify');
var reactify= require('reactify');
var source = require('vinyl-source-stream');

gulp.task('live-server', function(){

    var server= new LiveServer('server/main.js');
    server.start();
})

gulp.task('bundle',function(){
  return browserify({
    entries:'app/main.jsx',
    debug:true,
  })
  .transform(reactify)
  .bundle()
  .pipe(source('app.js'))
  .pipe(gulp.dest('./.tmp'))

})


gulp.task('serve',['bundle','live-server'],function(){
    browserSync.init(null,{
        proxy: "http://localhost:7777",
        port:9001
    })
})

我的main.jsx有以下内容

 var React = require('react');
var createReactClass = require('create-react-class');

var GroceryItemList=require('./components/GroceryItemsList.jsx');

React.render(<GroceryItemList/>,app);

groceryitems.jsx有以下内容

var React = require('react');
var createReactClass = require('create-react-class');
module.exports=React.createReactClass({

        render:function(){
            return(
                <div>
                    <h1> Grocery Listify </h1>
                </div>

            )

        }
})    

当我添加createReactClass时,我得到一个错误:createReactClass不是一个函数,当我添加import和ES6语法时,我得到'非法导入减速'谢谢,

纳文

Answer 1

这肯定是一个版本问题,如果你刚刚开始,我建议你创建一个React component扩展React.Component而不是使用,React.createClass因为它从版本16.0开始被弃用,并且已被移动到一个单独的包,'create-react-class'因为@Dream_Cap也提到

还要使用ES6语法进行导入.您可以将代码修改为

import React from 'react';

export default class App extends React.Component {
    render(){
       return(
           <div>
               <h1> the list  </h1>
           </div>   
        )
     }
}

Answer 2

根据文档,您需要获取npm create react类包.从项目文件路径的命令行,您需要执行npm install create-react-class --save,然后修改如下代码:

var React = require('react');
//You need this npm package to do createReactClass
var createReactClass = require('create-react-class');

    module.exports=createReactClass({
            render:function(){
                return(
                    <div>
                        <h1> the list  </h1>
                    </div>   
                )
            }

您还需要React DOM来呈现这样的组件:

npm install react react-dom
var ReactDOM = require('react-dom');
ReactDOM.render(<GroceryItemList/>,app);

Answer 3

如果您收到一条错误,指出React.creatClass是一个未定义的函数,那是因为较新版本的react不支持.

您可以尝试以下方法:

安装NPM create-react-class包:

npm install create-react-class --save-dev

然后在ReactDom变量下创建一个新变量:

var createReactClass = require('create-react-class');

现在不使用组件的React.createClass()而是使用var createReactClass()

示例:替换此:

var TodoComponent = React.createClass({render:function(){return(<h1>Helloooo </h1>);}});

有了这个:

var TodoComponent = createReactClass({render:function(){return(<h1>Helloooo </h1>);}});