我还是新手,我正在尝试将 react 和 reactstrap 用于工作中的内部项目。我花了几个小时试图让 NavDropdown 组件工作。我已经尝试将示例代码从https://reactstrap.github.io/components/dropdowns/移植到我的项目中,以对其进行测试并构建我自己的导航,并从这个示例https://codepen.io/eddywashere/中获取线索笔/KgjQay?editors=0010
但是,我无法打开下拉菜单。
当我检查元素时,我可以在检查器中看到 NavDropdown 及其子元素。当我单击 DropDown 元素时,我可以看到它的 state.isOpen 切换为 true。但是 - 下拉菜单实际上并没有显示,它仍然关闭。
我没有 console.log 错误,我对自己做错了什么感到非常困惑。很想了解我在这方面的错误,以便我们可以使用图书馆。
这是我尝试在其中使用 NavDropDown 的标头组件:
import React from 'react';
import { Navbar, Nav, NavDropdown, DropdownToggle, DropdownMenu, DropdownItem} from 'reactstrap';
class Header extends React.Component {
constructor(props) {
super(props);
this.state = {
dropdown: false
};
this.dropdownToggle = this.dropdownToggle.bind(this);
}
dropdownToggle() {
this.setState({
dropdown: !this.state.dropdown
});
}
render() {
return (
<header>
<Navbar color="light">
<Nav navbar>
<NavDropdown isOpen={this.state.dropdown} toggle={this.dropdownToggle}>
<DropdownToggle color="primary" nav caret>
Dropdown
</DropdownToggle>
<DropdownMenu>
<DropdownItem>Header</DropdownItem>
<DropdownItem>Action</DropdownItem>
<DropdownItem>Another Action</DropdownItem>
<DropdownItem>Another Action</DropdownItem>
</DropdownMenu>
</NavDropdown>
</Nav>
</Navbar>
</header>
);
}
}
export default Header
这是我将标头导入到的 App.js 文件:
import React from 'react';
import Header from './shared/Header';
class App extends React.Component {
render() {
return (
<div>
<Header/>
</div>
);
}
}
export default App;`
这是我的 index.js
import React from 'react';
import ReactDOM from 'react-dom';
import { BrowserRouter } from 'react-router-dom'
import App from './comp/App';
import registerServiceWorker from './registerServiceWorker';
import 'bootstrap/dist/css/bootstrap.css';
import './Index.css';
ReactDOM.render(
<BrowserRouter><App /></BrowserRouter>,
document.getElementById('root')
);
registerServiceWorker();
我使用 create-react-app 启动项目,这是我的 package.json
{
"name": "estimator",
"version": "0.1.0",
"private": true,
"dependencies": {
"bootstrap": "^4.0.0-alpha.6",
"node-sass-chokidar": "0.0.3",
"prop-types": "^15.5.10",
"react": "^15.6.1",
"react-addons-css-transition-group": "^15.6.0",
"react-addons-transition-group": "^15.6.0",
"react-burger-menu": "^2.1.4",
"react-dom": "^15.6.1",
"react-icons": "^2.2.5",
"react-loading": "^0.1.4",
"react-modal": "^2.2.4",
"react-router-dom": "^4.1.2",
"react-scripts": "1.0.11",
"reactstrap": "^4.8.0",
"redux-thunk": "^2.2.0"
},
"scripts": {
"build-css": "node-sass-chokidar src/ -o src/",
"watch-css": "npm run build-css && node-sass-chokidar src/ -o src/ --watch --recursive",
"start-js": "react-scripts start",
"start": "npm-run-all -p watch-css start-js",
"build": "npm run build-css && react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject"
},
"devDependencies": {
"npm-run-all": "^4.0.2"
}
}