[tools] the use of react-router5

mind_ programmonkey 2020-11-13 04:19:15
tools use react-router5 react router


【 Tools section 】React-Router5 Routing tutorial

Self introduction.

React-Router As React An important part of the system , It's a routing Library . It can manage URL, Realize the switching of components and state transformation .

It's been a long time ~~
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One 、React-Router and React-Router-dom The choice of

React-Router

React-router Provided some router At the heart of api, Include Router, Route, Switch etc. , But it doesn't offer dom Operation to jump api.

React-Router-dom

React-router-dom Provides BrowserRouter, Route, Link etc. api, We can go through dom Event control routing for . For example, click a button to jump , Most of the time we are in this situation , So in the development process , We use more React-router-dom.

Two 、 Get ready react application

1. establish react application

npx create-react-app my-app
cd my-app

2. download react-router-dom

yarn add react-router-dom

3. stay vscode Install plug-ins in react-native

3、 ... and 、 The basic usage of routing

1. Effect display

2. The code structure

  • REACT-ROUTER-DEMO
    • index.js
    • src
      • pages
        • react_router_demo1
          • demo.js
          • home.js
          • news.js
          • user.js

a.demo.js

import React from 'react';
import {

BrowserRouter as Router,
Route,
Link
} from "react-router-dom";
import Home from './home';
import News from './news';
import Users from './user';
class demo extends React.Component {

constructor(props) {

super(props);
this.state = {
 };
}
render() {

return (
<Router>
<div>
<ul>
<li>
<Link to="/">Home</Link>
</li>
<li>
<Link to="/news">News</Link>
</li>
<li>
<Link to="/users">Users</Link>
</li>
</ul>
<hr/>
<Route exact path="/">
<Home />
</Route>
<Route path="/news">
<News />
</Route>
<Route path="/users">
<Users />
</Route>
</div>
</Router>
);
}
}
export default demo;

b.home.js

import React from 'react';
class home extends React.Component {

constructor(props) {

super(props);
this.state = {
 };
}
render() {

return (
<div>
This is the content of the home page
</div>
);
}
}
export default home;

c.news.js

import React from 'react';
class news extends React.Component {

constructor(props) {

super(props);
this.state = {
 };
}
render() {

return (
<div>
This is the news page
</div>
);
}
}
export default news;

d.user.js

import React from 'react';
class user extends React.Component {

constructor(props) {

super(props);
this.state = {
 };
}
render() {

return (
<div>
This is the user page
</div>
);
}
}
export default user;

e.index.js

import React from 'react';
import ReactDOM from 'react-dom';
import * as serviceWorker from './serviceWorker';
import Demo from './pages/react_router_demo1/demo';
ReactDOM.render(
<React.StrictMode>
<Demo />
</React.StrictMode>,
document.getElementById('root')
);
// If you want your app to work offline and load faster, you can change
// unregister() to register() below. Note this comes with some pitfalls.
// Learn more about service workers: https://bit.ly/CRA-PWA
serviceWorker.unregister();

Four 、 Nested usage of routing

1. Effect display

2. The code structure

REACT-ROUTER-DEMO

  • index.js
  • src
    • pages
      • react_router_demo2
        • Demo.js
        • home.js
        • news.js
        • Newsone.js
        • Newstwo.js
        • route_config.js
        • user.js

a.route_config.js

import Home from './home';
import News from './news';
import Newsone from './Newsone';
import Newstwo from './Newstwo';
import Users from './user';
const routes = [
{

path:"/",
exact:true,
component:Home
},
{

path:"/news",
component:News,
routes:[
{

path:"/news/news_1",
component:Newsone
},
{

path:"/news/news_2",
component:Newstwo
}
]
},
{

path:"/users",
component:Users
}
];
export default routes;

b.news.js

import React from 'react';
import {

Route,
Link
} from "react-router-dom";
class news extends React.Component {

constructor(props) {

super(props);
this.state = {
 };
}
render() {

return (
<div>
<h2> This is the news page </h2>
<ul>
<li>
<Link to="/news/news_1">news1</Link>
</li>
<li>
<Link to="/news/news_2">news2</Link>
</li>
</ul>
{

this.props.routes.map((value, key) => {

return <Route key={
key}
exact
path={
value.path}
render={
props=>(
<value.component {
...props} routes={
value.routes} />
)}
/>
})
}
</div>
);
}
}
export default news;

c.Newsone.js

import React from 'react';
class Newsone extends React.Component {

constructor(props) {

super(props);
this.state = {

};
}
render() {

return (
<div>
Journalism 1 The content of
</div>
);
}
}
export default Newsone;

d.Newstwo.js

import React from 'react';
class Newstwo extends React.Component {

constructor(props) {

super(props);
this.state = {

};
}
render() {

return (
<div>
Journalism 2 The content of
</div>
);
}
}
export default Newstwo;

e.Demo.js

import React from 'react';
import {

BrowserRouter as Router,
Route,
Link
} from "react-router-dom";
import routes from './route_config';
class Demo extends React.Component {

constructor(props) {

super(props);
this.state = {

};
}
render() {

return (
<Router>
<div>
<ul>
<li>
<Link to="/">Home</Link>
</li>
<li>
<Link to="/news">News</Link>
</li>
<li>
<Link to="/users">Users</Link>
</li>
</ul>
<hr/>
{

routes.map((route,key)=>{

if(route.exact){

return <Route key={
key} exact path={
route.path}
render={
props=>(
<route.component {
...props} routes={
route.routes} />
)}
/>
}
else{

return <Route key={
key} path={
route.path}
render={
props=>(
<route.component {
...props} routes={
route.routes} />
)}
/>
}
})
}
</div>
</Router>
);
}
}
export default Demo;

f.index.js

import React from 'react';
import ReactDOM from 'react-dom';
import * as serviceWorker from './serviceWorker';
import Demo from './pages/react_router_demo2/Demo';
ReactDOM.render(
<React.StrictMode>
<Demo />
</React.StrictMode>,
document.getElementById('root')
);
// If you want your app to work offline and load faster, you can change
// unregister() to register() below. Note this comes with some pitfalls.
// Learn more about service workers: https://bit.ly/CRA-PWA
serviceWorker.unregister();

5、 ... and 、React Router URL Pass value

1. Effect display

2. The code structure

On the basis of the above code home.js Make changes , as well as route_config.js modify As well as add Info.js file .

a.route_config.js

Modify it , Add the following code

 {

path:"/Info/:id",
component:Info
}

b.home.js

import React from 'react';
import {

BrowserRouter as Router,
Route,
Link
} from "react-router-dom";
class home extends React.Component {

constructor(props) {

super(props);
this.state = {
 };
}
render() {

return (
<div>
This is the content of the home page
<ul>
<li>
<Link to="/Info/lcz"> Routing values :lcz</Link>
</li>
<li>
<Link to="/Info/zcl"> Routing values :zcl</Link>
</li>
</ul>
</div>
);
}
}
export default home;

c.Info.js

import React from 'react';
import {
withRouter} from 'react-router-dom';
class Info extends React.Component {

constructor(props) {

super(props);
this.state = {

};
}
componentDidMount(){

console.log(this.props.match.params.id)
}
render() {

return (
<div>
<h3>Info:{
this.props.match.params.id}</h3>
</div>
);
}
}
export default Info;

Be careful : This is used here this.props.match.params To take a value

6、 ... and 、React Router 404 Request configuration

On the basis of the above , stay Demo.js Add a new page in , And add an unconfigured route .

1. Effect display

2. The code structure

a.Demo.js

Add a new Link.

<li>
<Link to="/lcz"> Personal center </Link>
</li>

And add a Switch

 <Switch>
{

routes.map((route,key)=>{

if(route.exact){

return <Route key={
key} exact path={
route.path}
render={
props=>(
<route.component {
...props} routes={
route.routes} />
)}
/>
}
else{

return <Route key={
key} exact path={
route.path}
render={
props=>(
<route.component {
...props} routes={
route.routes} />
)}
/>
}
})
}
</Switch>

stay route_config.js Add the following code to

{

component:NotMatch
},

And configured NotMatch.js The page of

import React from 'react';
class NotMatch extends React.Component {

constructor(props) {

super(props);
this.state = {

};
}
render() {

return (
<div>
404
</div>
);
}
}
export default NotMatch;

Last , Keep it up to date !!! Work hard, work hard !!!
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