如果我有根 store组件并在其中嵌入了一个产品组件，该组件使用路由 /product/:id 呈现产品, root / 是正常行为吗, 每次我更换产品时呈现？

import React, {Component} from "react";
import ReactDOM from "react-dom";

import { BrowserRouter, Route, Link } from "react-router-dom";


const Products = [
  { "id" : "First", info : "Great product"},
  { "id" : "Second", info : "Another Great product"},
  { "id" : "Third", info : "Some other product"},
  { "id" : "Fourth", info : "Worst product"},
]

class ProductDetail extends Component {
  render(){
    console.log("rendering ProductDetail");
    const {match} = this.props;
    const product = Products.find(({id}) => id === match.params.productId);
    return <div>
      <h3>{product.id}</h3>
      <span>{product.info}</span>
    </div>
  }
}

class Product extends Component {
  render(){
  console.log("rendering Product");
    const {match} = this.props;
    return <div>
      <h2>This shows the products</h2>
      <ul>
        {Products.map(p=><li><Link to={`${match.url}/${p.id}`}>{p.id}</Link></li>)}
      </ul>
      <Route path={`${match.path}/:productId`} component={ProductDetail}/>
    </div>
  }
}

class Store extends Component {
   render(){
  console.log("rendering Store");
     const {match} = this.props;
     return <div>
       <h1>This is the Store</h1>
        <Link to={`${match.url}product`}>See products</Link>
       <Route path={`${match.path}product`} component={Product}/>
     </div>
   }
}

function App() {
  console.log("rendering App");
  return (
    <div className="App">
      <BrowserRouter>
        <Route path="/" component={Store}/>
      </BrowserRouter>
    </div>
  );
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

使用此示例代码，根 store每次从任何 /product/* 更改时都会重新渲染到另一个/product/* .

如果只有子项发生变化，是否有推荐的方法来防止根重新渲染？

我正在使用 react-router v5 .可以测试代码here

最佳答案

<BrowserRouter>
    <Route exact path="/" component={Store}/>
  </BrowserRouter>


 // I think its solve your issue add 'exact'

https://stackoverflow.com/questions/56665738/