Javascript react路由器v4错误链路组件
我有一个从Javascript react路由器v4错误链路组件,javascript,reactjs,react-router,Javascript,Reactjs,React Router,我有一个从react路由器dom导入链接的组件 import React, { Component } from 'react'; import { Link } from 'react-router-dom'; class Sidebar extends Component{ render() { return ( <div className="be-left-sidebar"> <div className="left-sid
react路由器dom导入链接的组件
import React, { Component } from 'react';
import { Link } from 'react-router-dom';
class Sidebar extends Component{
render() {
return (
<div className="be-left-sidebar">
<div className="left-sidebar-wrapper"><a href="#" className="left-sidebar-toggle">Blank Page</a>
<div className="left-sidebar-spacer">
<div className="left-sidebar-scroll">
<div className="left-sidebar-content">
<ul className="sidebar-elements">
<li className="divider">Menu</li>
<li className="parent"><a href="#"><i className="icon mdi mdi-home" /><span>Home</span></a>
<ul className="sub-menu">
<li><Link to='/'>Home</Link>
</li>
</ul>
</li>
</ul>
</div>
</div>
</div>
<div className="progress-widget">
<div className="progress-data"><span className="progress-value">60%</span><span className="name">Current Project</span></div>
<div className="progress">
<div style={{width: '60%'}} className="progress-bar progress-bar-primary" />
</div>
</div>
</div>
</div>
);
}
};
export default Sidebar;
import React,{Component}来自'React';
从'react router dom'导入{Link};
类边栏扩展组件{
render(){
返回(
菜单
-
- 家
当前项目的60%
);
}
};
导出默认边栏;
然后console.log显示一个错误
警告:失败的上下文类型:上下文路由器在链接中标记为必需,但其值未定义。
无法读取未定义的属性“历史记录”
感谢React router v4中的交换机、路由和链路组件,我们从React router dom导入这些组件,并按如下方式配置路由器:
import { Switch, Route, Link } from 'react-router-dom';
<span>LINKS:</span>
<ul>
<li onClick={this.props.goToDefault}><Link to={'/'}>Go To Default</Link></li>
<li onClick={this.props.goToSub1}><Link to={'/left-sub1'}>Go To One</Link></li>
<li onClick={this.props.goToSub2}><Link to={'/left-sub2'}>Go To Two</Link></li>
</ul>
<Switch>
<Route exact path='/' component={LeftSubDefault} />
<Route path='/left-sub1' component={LeftSubOne} />
<Route path='/left-sub2' component={LeftSubTwo} />
</Switch>
import { BrowserRouter } from 'react-router-dom';
<BrowserRouter>
<App />
</BrowserRouter>
从'react router dom'导入{Switch,Route,Link};
链接:
- 转到默认值
- 转到一
- 转到两个
在app.js或任何您的输入文件中。将应用程序组件包装在BrowserRouter中,如下所示:
import { Switch, Route, Link } from 'react-router-dom';
<span>LINKS:</span>
<ul>
<li onClick={this.props.goToDefault}><Link to={'/'}>Go To Default</Link></li>
<li onClick={this.props.goToSub1}><Link to={'/left-sub1'}>Go To One</Link></li>
<li onClick={this.props.goToSub2}><Link to={'/left-sub2'}>Go To Two</Link></li>
</ul>
<Switch>
<Route exact path='/' component={LeftSubDefault} />
<Route path='/left-sub1' component={LeftSubOne} />
<Route path='/left-sub2' component={LeftSubTwo} />
</Switch>
import { BrowserRouter } from 'react-router-dom';
<BrowserRouter>
<App />
</BrowserRouter>
从'react router dom'导入{BrowserRouter};
这是一篇很好的文章,可能会有所帮助。请确保您的组件出现在
组件中 我想你需要看看路由器。你确定你的组件出现在
组件中吗?您的react路由器dom的确切版本是什么?谢谢,我不知道react路由器dom组件必须由router@philippsh包装