Try it yourself:Finding space outside of Switch routes is ideal for a navigation bar; it stays in one place as the user clicks through routed components.Topic change: you put your pets’ website aside, and made a new one about your marbles collection.If you would like to feature each of your 1,000 marbles on your website individually, it makes sense to create just one component to reuse for each.Amazing! Let’s make some navigational React components with React Router. We have a very important attribute called ‘exact’ in our Homepage route; we’ll go over it right after we’re set up.You should be able to access each of your components at their respective paths by manually typing them in (we will write links with Link soon):Let’s go over the incredible importance of the ‘exact’ attribute found in our homepage Route:To give you an idea of how critical the attribute is, try deleting “exact,” save, and try visiting each of the three paths in your browser. In this article we’ll cover:React Router is a library that lets you delineate your routes on the front-end, so a user sees one component of your choice on localhost:3000/homepage, another on localhost:3000/faq, and others on /links, /contact, etc. I hope this guide will be helpful for you to learn the best approach. react-router-dom provides switch and Link which are very useful to route the components In react. react-router-domを設置するとき、依存性パッケージとしてreact-routerも一緒に設置される。 の追加 v3では排他的（exclusive）で、urlにマッチされた最初のだけレンダリングされるが、v4ではもう排他的ではない。 You can make a React app already, but clicking around now is the name of the game.Let’s write three components in a components.js file in src that we’ll later put on different ‘pages’ or routes.

This article is for beginners who want to learn how to implement multiple layouts to React using React Router V4. In case of ‘/dog’, it includes ‘/’ so it renders the Homepage component ‘exact’ fixes this problem, as it ensures we are only rendering a component if it matches exactly.Keep it at the bottom, so it’s only reached when none of our other pathnames match the user’s request.But this isn’t enough! But this isn’t enough! Don’t forget to import your Routes page.Import { Router } from ‘react-router-dom’ and have Router tags encase our Routes page.Finally, in order for us to track our navigation, import createHistory from ‘history/createBrowserHistory’, assign createHistory() to a variable named history, and have history be the ‘history’ attribute of Router.Following the logic of how Route decides which routes to display, can you guess how we can make a “page not found” component render any time an unrecognized pathname is accessed?And a final Route in routes.js, with no path attribute:And one that goes N steps forward or backward like this:We can even add a home button that pushes Homepage into our history ‘array’, and takes us there:You may not want your entire webpage to transform with every click, so don’t overlook this way of writing your routes. Inside the Switch is a list of Route. Copyright © 2015 - Programming with Mosh - So, how does the component know which marble to display?‘props.match.params’ accesses the ‘params’ (the bit after the colon) we set in our Routes. React Router. import { BrowserRouter, Link, Route, Switch} from 'react-router-dom'; : class Hello extends React.Component { render() { return ( :