【发布时间】:2017-04-21 10:48:11
【问题描述】:
我有一个顶部有导航的应用程序(主页、关于、常见问题)。只有在 HOME 路线上,我需要隐藏菜单然后显示 onscroll。导航是在 App.jsx 中构建的,因此它出现在每个页面上。如何仅为这条特定路线启用显示?
我的显示组件
import React, { Component } from 'react';
class NavScroll extends React.Component {
constructor(props){
super(props);
this.state={isHide:false};
this.hideBar = this.hideBar.bind(this)
}
hideBar(){
let {isHide} = this.state
window.scrollY > this.prev?
!isHide && this.setState({isHide:true})
:
isHide && this.setState({isHide:false})
this.prev = window.scrollY;
}
componentDidMount(){
window.addEventListener('scroll',this.hideBar);
}
componentWillUnmount(){
window.removeEventListener('scroll',this.hideBar);
}
render(){
let classHide=this.state.isHide?"hide":""
return <div className={"fixed "+classHide}>
</div>;
}
}
export default NavScroll;
App.jsx
import React, { Component } from 'react';
import NavLink from './global/NavLink.jsx';
import Footer from './global/Footer.jsx';
import NavScroll from './global/NavScroll.jsx';
var App = React.createClass({
render: function(){
return (
<div>
<div>
<NavLink to="/"><img className="logo" alt="HOME"></img></NavLink>
<NavLink to="/about" className="navMenuButton">ABOUT</NavLink>
<NavLink to="/faq" className="navMenuButton">FAQ</NavLink>
</div>
{ this.props.children }
<Footer />
</div>
);
}
});
export default App;
【问题讨论】:
标签: javascript reactjs routes components react-router