[英]React - Syntaxerror: unexpected token <
I'd like to use Express, pg and react for my project. 我想使用Express,pg并对我的项目做出反应。 But react give me some problems.
但是反应给我带来了一些问题。
Here's my project's dir 这是我项目的目录
index.js index.js
var express = require('express');
var server = express();
var path = require('path');
var app = require('./app/app.js');
server.get('/', function (req, res) {
res.sendFile(path.join(__dirname + '/public/index.html'));
});
server.listen(3000, function () {
console.log("server is running on port 3000!");
});
var connexionDB = require('./db/connexionAvecPg');
app.js app.js
var react = require('react');
var {render} = require('react-dom');
var App = react.createClass({
render: function () {
return(
<div>
<p>test</p>
</div>
);
}
});
render(
<App/>,
document.getElementById('root')
);
(Yes it's ES5, but i have my reason for using it instead of ES6-7) (是的是ES5,但是我有理由使用它而不是ES6-7)
What's wrong with my code? 我的代码有什么问题? did i forget something?
我忘记了什么吗? Thx for your time.
谢谢你的时间。
---\\ EDIT /--- ---编辑/-
After Ming Soon's answer, I tried this: 在明顺回答之后,我尝试了以下操作:
app.js app.js
var React = require('react');
var ReactDOM = require('react-dom');
class App extends React.component{
render() {
return React.createElement('div', null, 'Test');
}
};
ReactDOM.render(
React.createElement(App, null),
document.getElementById('root')
);
But i have this: 但是我有这个:
/home/josue/im-expressandpg/app/app.js:14
class App extends React.component{
^
TypeError: Class extends value undefined is not a constructor or null
---\\ EDIT 2 /--- ---编辑2 / ---
Thx to PSo i saw my mistake. 谢谢PSo我看到了我的错误。 I changed this:
我改变了这个:
class App extends React.component{
To this: 对此:
class App extends React.Component{
When i exec: 当我执行时:
/home/josue/im-expressandpg/app/app.js:17
document.getElementById('root')
^
ReferenceError: document is not defined
If i add this: 如果我添加此:
var document = require('./../public/index.html');
I get: 我得到:
/home/josue/im-expressandpg/public/index.html:1
(function (exports, require, module, __filename, __dirname) { <!doctype html>
^
SyntaxError: Unexpected token <
Remove the lower part of the code, that's duplicate of render function. 删除代码的下部,即渲染功能的重复部分。 And remember to export it for later use.
并记得将其导出以供以后使用。
var React = require('react');
var ReactDOM = require('react-dom');
class App extends React.Component{
render() {
return React.createElement('div', null, 'Test');
}
};
export default App;
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