对某些案例问题做出警告警告compactMatch？

Question

我有名为isAuthenticated的道具，它还显示某些情况警告在控制台中仍然存在。请检查一下。

import React,{Component} from "react";
import {BrowserRouter as Router, Switch, Route} from "react-router-dom";
import LogoutHome from './Logout_Home';
import SignIn from '../Components/SignIn';
import jwt_decode from 'jwt-decode';
import {setCurrentUser} from '../actions/authActions';
import SignUp from '../Components/SignUp';
import setAuthToken from '../util/setAuthToken';
import AboutUs from '../containers/AboutUs';
import store from '../store';
import {connect} from "react-redux";
// check for TOKEN
if (localStorage.jwtToken) {
  // Set auth token header auth
  setAuthToken(localStorage.jwtToken);
  // Decode token and get user info and exp
  const decoded = jwt_decode(localStorage.jwtToken);
  // Set user and isAuthenticated
  store.dispatch(setCurrentUser(decoded));

  // Check for expired token
  const currentTime = Date.now() / 1000;
  if (decoded.exp < currentTime) {
    // Logout user
    store.dispatch(logoutUser());

    // Redirect to login
    window.location.href = '/login';
  }
}
class HomePage extends Component
{
  componentDidMount(){
    console.log(this.props.auth.isAuthenticated);
  }
    render(){
      var {
        isAuthenticated
      } = this.props.auth;
      return(
        <div>
          <Router>
            <div>
              <Switch>
                {this.props.auth.isAuthenticated===false ? (
                  <div>
                  <Route exact path='/' component={LogoutHome}/>
                  <Route  path='/Finance/Login' component={SignIn}/>
                  <Route  path='/Finance/AboutUs' component={AboutUs}/>
                  <Route  path='/Finance/ContactUs' component={ContactUs}/>
                  <Route  path='/Finance/SignUp' component={SignUp}/>
                  <Route  path='/Finance/Forgotpassword' component={Forgotpassword}/>
                  </div>
                  ) : (
                    <div>
                  <Route  path='/Finance/Home' component={Home}/>
                  </div>
                  )}
              </Switch>
            </div>
          </Router>
        </div>
      );
    }
}
function mapStateToProps(state){
  return{
    auth : state.auth
  };
}
export default connect(mapStateToProps)(HomePage);

警告是这样的：

index.js:2178 Warning: React does not recognize the `computedMatch` prop on a DOM element. If you intentionally want it to appear in the DOM as a custom attribute, spell it as lowercase `computedmatch` instead. If you accidentally passed it from a parent component, remove it from the DOM element.
    in div (at Homepage.js:50)
    in Switch (at Homepage.js:48)
    in div (at Homepage.js:47)
    in Router (created by BrowserRouter)
    in BrowserRouter (at Homepage.js:46)
    in div (at Homepage.js:45)
    in HomePage (created by Connect(HomePage))
    in Connect(HomePage) (at App.js:10)
    in div (at App.js:9)
    in App (at index.js:10)
    in Provider (at index.js:9)

我不了解天气是案例问题还是因为我在很多地方都读过，但是得到的答案却不尽相同。上面粘贴的只是首页组件。

Answer 1

从React 文档

如果您尝试使用React无法识别为合法DOM属性/属性的道具来渲染DOM元素，则会触发unknown-prop警告。您应该确保您的DOM元素周围没有虚假的道具。

在<Swtich>组件内部，您将看到以下行。

React.cloneElement(child, { location, computedMatch: match })

在这种情况下，child就是您的<div></div>，因此会将非标准道具computedMatch传递到本地dom节点<div>，因此React给您一个健康的警告。因此，使用<>或<Fragment>将丢弃警告。

Answer 2

正如其他人所说，问题来自于<div>直接在<Switch>元素内部。从文档中<Switch>：

a 的所有子元素<Switch>都应该是<Route>或<Redirect>元素。

因此，虽然您显然可以通过将元素包装在片段标签中来消除此错误，但将其包装在元素中更符合预期用途<Route>。

<Route>没有道具的A应该提供预期的行为。

Answer 3

我解决了这个问题，删除 <div>标签内的标签。或替换 <div>为<React.Fragment>。

在这种情况下 ：

import React,{Component} from "react";
import {BrowserRouter as Router, Switch, Route} from "react-router-dom";
import LogoutHome from './Logout_Home';
import SignIn from '../Components/SignIn';
import jwt_decode from 'jwt-decode';
import {setCurrentUser} from '../actions/authActions';
import SignUp from '../Components/SignUp';
import setAuthToken from '../util/setAuthToken';
import AboutUs from '../containers/AboutUs';
import store from '../store';
import {connect} from "react-redux";
// check for TOKEN
if (localStorage.jwtToken) {
  // Set auth token header auth
  setAuthToken(localStorage.jwtToken);
  // Decode token and get user info and exp
  const decoded = jwt_decode(localStorage.jwtToken);
  // Set user and isAuthenticated
  store.dispatch(setCurrentUser(decoded));

  // Check for expired token
  const currentTime = Date.now() / 1000;
  if (decoded.exp < currentTime) {
    // Logout user
    store.dispatch(logoutUser());

    // Redirect to login
    window.location.href = '/login';
  }
}
class HomePage extends Component
{
  componentDidMount(){
    console.log(this.props.auth.isAuthenticated);
  }
    render(){
      var {
        isAuthenticated
      } = this.props.auth;
      return(
        <div>
          <Router>
            <div>
              <Switch>
                {this.props.auth.isAuthenticated===false ? (
                  <React.Fragment>
                  <Route exact path='/' component={LogoutHome}/>
                  <Route  path='/Finance/Login' component={SignIn}/>
                  <Route  path='/Finance/AboutUs' component={AboutUs}/>
                  <Route  path='/Finance/ContactUs' component={ContactUs}/>
                  <Route  path='/Finance/SignUp' component={SignUp}/>
                  <Route  path='/Finance/Forgotpassword' component={Forgotpassword}/>
                  </React.Fragment>
                  ) : (
                    <React.Fragment>
                  <Route  path='/Finance/Home' component={Home}/>
                  </React.Fragment>
                  )}
              </Switch>
            </div>
          </Router>
        </div>
      );
    }
}
function mapStateToProps(state){
  return{
    auth : state.auth
  };
}
export default connect(mapStateToProps)(HomePage);

Answer 4

我遇到了这个问题，react-router-dom因为我在div我的Switch. 相反，我将div我的外部移到了我的外部Switch，错误就消失了。