是什么导致 Semantic-UI-React 元素破坏我的基本 Reactjs 应用程序?
What is causing Semantic-UI-React elements to break my basic Reactjs App?
我是 React 的新手,正在尝试使用 Semantic-ui-react。我按照说明安装 React and Semantic UI React,但在开发 console/browser 中每次我尝试从 Semantic-ui-反应:
Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in.
Check the render method of App
.
页面错误消息的屏幕截图
控制台错误消息的屏幕截图
当我 console.log
Semantic-ui-react 元素之一导入后,它 returns 未定义。
删除 Semantic-ui-react 元素,但保留 JSX 可以解决错误。我已经尝试重新安装 React 和 Semantic UI React,仔细检查了我的 imports/exports,并仔细检查了我的语法,但我找不到问题所在。
回购:https://github.com/LATAEVIA/SS-Artistpage
Package.json
"dependencies": {
"react": "^16.1.0",
"react-dom": "^16.1.0",
"react-scripts": "1.0.17"
"react-scripts": "1.0.17",
"semantic-ui-css": "^2.2.12",
"semantic-ui-react": "^0.76.0"
Index.html
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.12/semantic.min.css"></link>
Index.js
import React from 'react';
import ReactDOM from 'react-dom';
// import './index.css';
import 'semantic-ui-css/semantic.min.css';
import App from './App';
import registerServiceWorker from './registerServiceWorker';
ReactDOM.render(<App />, document.getElementById('root'));
registerServiceWorker();
App.js
import React, { Component } from 'react';
import './App.css';
import { Button, Icon, Header, Container } from 'semantic-ui-css/semantic.min.css';
console.log(Button);
class App extends Component {
render() {
return ([
<Container>
<div key={0}>
<Header>
<img alt="Artist Image" />
<h1>Artist Name</h1>
<p>
Artist Bio
</p>
</Header>
</div>,
<div key={1}>
<h2>(Artist Name) Songs That Feel Like:</h2>
<form>
<input type="checkbox" name="mood_tags" value="Calm" /> Calm<br/>
<input type="checkbox" name="mood_tags" value="Mellow" /> Mellow<br/>
<input type="submit" value="Submit" />
<Button size='small' color='green'>
<Icon name='download' />
Download
</Button>
</form>
</div>
</Container>
]);
}
}
export default App;
替换:
import { Button, Icon, Header, Container } from 'semantic-ui-css/semantic.min.css';
作者:
import { Button, Icon, Header, Container } from 'semantic-ui-react';
import 'semantic-ui-css/semantic.min.css';
的确,无法从 css 文件中导入组件。
我是 React 的新手,正在尝试使用 Semantic-ui-react。我按照说明安装 React and Semantic UI React,但在开发 console/browser 中每次我尝试从 Semantic-ui-反应:
Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in.
Check the render method of
App
.
页面错误消息的屏幕截图
控制台错误消息的屏幕截图
当我 console.log
Semantic-ui-react 元素之一导入后,它 returns 未定义。
删除 Semantic-ui-react 元素,但保留 JSX 可以解决错误。我已经尝试重新安装 React 和 Semantic UI React,仔细检查了我的 imports/exports,并仔细检查了我的语法,但我找不到问题所在。
回购:https://github.com/LATAEVIA/SS-Artistpage
Package.json
"dependencies": {
"react": "^16.1.0",
"react-dom": "^16.1.0",
"react-scripts": "1.0.17"
"react-scripts": "1.0.17",
"semantic-ui-css": "^2.2.12",
"semantic-ui-react": "^0.76.0"
Index.html
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/semantic-ui/2.2.12/semantic.min.css"></link>
Index.js
import React from 'react';
import ReactDOM from 'react-dom';
// import './index.css';
import 'semantic-ui-css/semantic.min.css';
import App from './App';
import registerServiceWorker from './registerServiceWorker';
ReactDOM.render(<App />, document.getElementById('root'));
registerServiceWorker();
App.js
import React, { Component } from 'react';
import './App.css';
import { Button, Icon, Header, Container } from 'semantic-ui-css/semantic.min.css';
console.log(Button);
class App extends Component {
render() {
return ([
<Container>
<div key={0}>
<Header>
<img alt="Artist Image" />
<h1>Artist Name</h1>
<p>
Artist Bio
</p>
</Header>
</div>,
<div key={1}>
<h2>(Artist Name) Songs That Feel Like:</h2>
<form>
<input type="checkbox" name="mood_tags" value="Calm" /> Calm<br/>
<input type="checkbox" name="mood_tags" value="Mellow" /> Mellow<br/>
<input type="submit" value="Submit" />
<Button size='small' color='green'>
<Icon name='download' />
Download
</Button>
</form>
</div>
</Container>
]);
}
}
export default App;
替换:
import { Button, Icon, Header, Container } from 'semantic-ui-css/semantic.min.css';
作者:
import { Button, Icon, Header, Container } from 'semantic-ui-react';
import 'semantic-ui-css/semantic.min.css';
的确,无法从 css 文件中导入组件。