[英]Expected an assignment or function call and instead saw an expression no-unused-expressions - how to fix this CI error?
[英]how to solve this Expected an assignment or function call and instead saw an expression no-unused-expressions
問題 :
./src/components/main.js 第 7 行:期望賦值或函數調用,但看到的是表達式 no-unused-expressions
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import React from 'react';
import { Switch, Route } from 'react-router-dom';
import LandingPage from './landingpage'
const Main = () => {
<Switch>
<Route exact path="/" component={LandingPage}/>
</Switch>
}
export default Main;
我該如何解決這個問題,請幫幫我
你錯過了幾件事。 首先,您需要從react-router-dom
導入BrowserRouter
或Router
。 你需要歸還你的路由器。
import React from 'react';
import { Switch, Route, BrowserRouter } from 'react-router-dom';
import LandingPage from './landingpage'
const Main = () => {
return(
<BrowserRouter>
<Switch>
<Route exact path="/" component={LandingPage}/>
</Switch>
</BrowserRouter/>
)
}
export default Main;
只需將括號大括號更改為括號即可。 當您在函數內部編寫 JSX 時,您需要使用括號而不是 Bracket,因為您的函數具有 JSX。 {}=>()
import React from 'react';
import { Switch, Route } from 'react-router-dom';
import LandingPage from './landingpage'
const Main = () => (
<Switch>
<Route exact path="/" component={LandingPage}/>
</Switch>
)
export default Main
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