[英]React.createClass is not a function, may be webpack compling error
我使用webpack设置反应环境,并使用以下代码运行代码:
webpack -d && webpack-dev-server --content-base src/ --inline --hot --port 1234
该cmd运行一些构建,然后显示以下行:
webpack: Compiled successfully.
代替 :
webpack: bundle is now VALID
就像我在示例中看到的那样。
并在浏览器控制台上显示:
Uncaught TypeError: React.createClass is not a function
会是什么呢?
我的依赖:
"dependencies": {
"react": "^16.0.0",
"react-dom": "^16.0.0"
},
"devDependencies": {
"babel-core": "^6.26.0",
"babel-loader": "^7.1.2",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"webpack": "^3.8.1",
"webpack-dev-server": "^2.9.4"
}
我的代码:
var React = require('react');
var ReactDOM = require('react-dom');
// Create component
var TodoComponent = React.createClass({
render: function () {
return(
<h1>Hello!!</h1>
);
}
});
// put component into html page
ReactDOM.render(<TodoComponent />, document.getElementById('todo-container'));
顺便说一句,这是我在这里的第一个问题,所以请原谅我的入门错误。
在React的React.createClass
版本中, React.createClass
已移至其自己的名为create-react-class
的包中。
此处的文档: https : //reactjs.org/blog/2017/09/26/react-v16.0.html#packaging
因此,您应该执行npm i create-react-class --save
。
然后调整您的代码:
var React = require('react');
var ReactDOM = require('react-dom');
var createClass = require('create-react-class');
// Create component
var TodoComponent = createClass({
render: function () {
return(
<h1>Hello!!</h1>
);
}
});
// put component into html page
ReactDOM.render(<TodoComponent />, document.getElementById('todo-container'));
否则,您应该使用ES6 class
Component,它在React中更加惯用:
var React = require('react');
var ReactDOM = require('react-dom');
// Create component
class TodoComponent extends React.Component {
render() {
return(
<h1>Hello!!</h1>
);
}
}
// put component into html page
ReactDOM.render(<TodoComponent />, document.getElementById('todo-container'));
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