So you won’t see if the page number has changed, unless you refresh the page. Instead of fetching fresh data to the server, you would be using the same data since this morning.
Imagine if somebody opens up your website in a tab in the morning then he will modify one of the books at 5pm. You should handle the case when you go directly to the link from the browser, and in that case, fetch data to the server. It’s possible that in this case, passing props through could be a convenient solution. Maybe you don’t have any application management system in place and if you don’t need this information globally, context would be a overkill. Maybe it’s inside -> -> -> -> and you’d be required to do lots of props drilling to lift up the state. To get access to that already fetched data, you could lift up the state in order to reuse that data in /book-modification.īut oh, imagine if the Link wrapping that pen edit button is perhaps deep down in the tree. On the book modification page there is exactly the same data that you have already fetched, book title, author and page number. So you click edit and you’re taken to /book-modification/ready-player-one You just discovered that there are 322 pages in Ready Player One but not 321 pages as it says on your page. It lists the book title, author and page number. Imagine that you have a page listing books. You could pass server data through Link in order to avoid requests to the server. For countries that don’t belong to the European Union, I will show two input fields, for other countries I want to display only one input field.īe careful, because if the user goes directly to /step2 your state will disappear so the user should go back to the beginning of the form if you didn’t save the nationality on the server or persist it in localStorage. You get transferred to /step2 and in the second step you get access to your object,. Based on your nationality, next step would be different. You’re on step 1, you have to type in your nationality. If you have a Gmail account, you can even see that they’re persisting to the history.state. Go ahead and fiddle with this, you could get some inspirations from the docs at Mozilla. Most probably state is null, history.length is the number of pages in the session history. Then type window.history or just history and click on ↵ Return on your keyboard. Open up Chrome, right click on the page, go to Inspect element and open up the console. If you’re interested in knowing more about that history API, you can log it in the browser’s console and play around with it. 
You could use this, in the exceptional case that you don’t care if the state is not there upon reload or back navigation. So in most cases you would choose to share props through state. The only drawback of history.state object is that it’s limited to 640k characters when it’s been serialised. When you pass the props through state, react router persists to the history.state which is using the history API that can be accessed in browsers through the DOM window object. In the case we land directly on /courses or if we’re coming from elsewhere in the application we go to the courses main page.Let’s say that if we’re coming from the dashboard to the /courses page, then we want to show all the courses in a drawer that appears to the right side.Let’s continue with the /courses example from react-router’s documentation That means that passing props through Link is an excellent way to give your component some props based on where you were before it got rendered.
You won’t have access to those same props if you go directly to that /courses url in your browser That’s because you will only have access to those props by clicking on Link. Passing props through the component is primarily there to pass props related to the navigation history. This is what props passing through looks like in the docs: Let’s take a look at how we can pass objects! Passing props through Link’s state There’s an excellent example of URL parameters in the doc: īut these URL parameters are limited to only strings.
#React router dom pass props how to#
For example if you’d want to help your friend finding out how to pass params with react-router, you will be able to share your search results with him: /courses?q=how+to+pass+params+through+link+in+react+router Passing props through URL params is very convenient when you want a shareable url. If you’re not and you find that something is not working, let me know about it, give me your react version and react-router version on Twitter and I’ll see if I can help. I’ll assume that you’re using hooks and v5 or v6 of react router.
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