在'react-router-dom'中傳遞Route的組件道具

Question

我正在使用reactjs，如何在Home組件上發送道具，它僅被稱為react-router-dom中Route的組件參數的值，我有一個名為sample的變量，我想在內部調用它的值家庭組件類，例如const sample = this.props.sample在這種情況下我該怎么做？

import React, { Component } from 'react';
import { Router, Route, Switch } from 'react-router-dom';
import ReactDOM from 'react-dom';

import Login from './components/Login';
import Home from './components/Home';
const sample = 'send this to home component';

class App extends Component {
  render() {
    return (
      <Router history={history}>
        <Switch>
          <div>
            <Route exact path="/" component={Login} /> 
            <Route path="/login" component={Login} />
            <Route path="/home" component={Home} />
          </div>
        </Switch>
      </Router>
    );
  }
}

export default App;

Answer 1

您可以創建一個新組件，該組件結合了react-router-doms路由和您自己的一些邏輯。

import React from "react"
import { Route, Redirect } from "react-router-dom"

const CustomRoute = ({ component: Component, sample, ...rest}) => {
    return(
        <Route 
            {...rest}
            //route has a render prop that lets you create a component in-line with the route
            render = {props =>
                sample === true ? (
                    <Component {...props} />
                ) : (
                    <Redirect to="/login"/>
                )
            }
        />
    )
}

export default CustomRoute

然后導入您的CustomRoute組件，並用它交換出本地路由。

<CustomRoute path="/home" component={Home} sample={sample}/>

Answer 2

在您的情況下，我將使其保持簡單：

<Route path="/home" render={ () => <Home sample={ sample && sample }/> } /> // sample && sample checks that the variable is not undefined

我想說這是首選方法，如果您只想傳遞一個或幾個道具。