Ita*_*ges 9 javascript reactjs react-router
我有两种类型的路线,国家和内容:
等等...
当用户进入应用程序时,我必须验证他是否已经选择了一个国家/地区,我正在使用localStorage保存该国家/地区。
如果用户已经选择了国家,他需要去/industry/ranking,如果没有,去/countries。
我收到有关通过代码更改路线的警告:
<Route> elements should not change from controlled to uncontrolled (or vice versa). You provided a "location" prop initially but omitted it on a subsequent render.
我的代码:
<Switch>
<Route exact path='/countries' component={Countries} />
{
current && (
<React.Fragment>
<Route exact path='/industry/ranking' render={() => <IndustryRanking country={current} />} />
<Route path='/industry/audience' render={() => <IndustryAudience country={current} />} />
<Route path='/website/ranking' render={() => <WebsiteRanking country={current} />} />
<Route path='/website/audience' render={() => <WebsiteAudience country={current} />} />
<Route path='/website/device' render={() => <WebsiteDevice country={current} />} />
<Route path='/website/conversion-orders' render={() => <WebsiteConversionOrders country={current} />} />
</React.Fragment>
)
}
{ !current ? <Redirect to='/countries' /> : <Redirect to='/industry/ranking' /> }
</Switch>
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有没有办法仅使用路线来验证我的状况来改善这一点?
谢谢!
您可以简单地编写一个自定义组件来呈现路线或重定向到国家/地区,而不是有条件地呈现导致此警告的路线
const CustomRoute = (props) => {
const current = localStorage.getItem('country');
if(current) {
return <Route {...props} />
}
return <Redirect to='/countries' />
}
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并像使用它一样
<Switch>
<CustomRoute exact path='/countries' component={Countries} />
<CustomRoute exact path='/industry/ranking' render={() => <IndustryRanking country={current} />} />
<CustomRoute path='/industry/audience' render={() => <IndustryAudience country={current} />} />
<CustomRoute path='/website/ranking' render={() => <WebsiteRanking country={current} />} />
<CustomRoute path='/website/audience' render={() => <WebsiteAudience country={current} />} />
<CustomRoute path='/website/device' render={() => <WebsiteDevice country={current} />} />
<CustomRoute path='/website/conversion-orders' render={() => <WebsiteConversionOrders country={current} />} />
<Redirect to='/industry/ranking' />
</Switch>
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