If you have a small one-off case where you need to handle these parameters in your app, read up more on how you can use the URLSearchParams constructor. In situations where you might have a mixture of the two, then using a package like React Router is even more advisable. Take note that in most applications, if the data is small, it may be a better idea to take more advantage of modern routing packages and put the data in the URL path instead of in query parameters. Now you know how to extract the search parameters (or query parameters) from a URL – both inside and outside of the React context. Please take the time to see how it’s done on the React Router Page. Luckily, useSearchParams also provides us with a setter method that makes it simple to update the search params. Before, this didn’t stop us, but if we had other interactions on the page or needed to do some other work in the onSubmit event, this could pose a problem. Now when we submit the form, the page does a full refresh. src/MovieForm.jsĬonst = useState('1') Ĭonst = useState(false) Ĭonst = useSearchParams( ) īecause of the RouterProvider, we no longer have to extract the search parameters manually, letting the useSearchParams hook do some of that work. Try it yourself before reading the code below and see if you get the same result. It uses the very same URLSearchParams internally, so this will only relieve us of a few minor lines of code at first. React Router has many useful hooks and tools to aid us with routing in our React applications, but we’re most interested in the useSearchParams hook. App-form from 'react-router-dom' Ĭonst root = ReactDOM.createRoot(document.getElementById('root')) įinally, we’re able to hop back into our MovieForm component. Go ahead and add this component to the App.js file and add the following CSS to App.css. Here is our simple form: // src/MovieForm.js Our app will be an extremely simple form that can be pre-populated from the URL’s query or search parameters. It returns an array containing 2 elements - const searchParams, setSearchParams useSearchParams (). Perhaps we want users to be able to share links with other people with a suggested rating for a specific movie. The useSearchParams hook is used to read and modify the query string in the URL for the current location. Let’s also suppose that we want to prepopulate this form via the search parameters from the URL. Let’s build a simple form that lets us submit a user rating for a movie without wasting too much time or making something completely arbitrary. We need a way to update the URLs search parameters to properly explore the different ways we can read the URL’s parameters. Now we should have the following: /* src/App.css */ yarn create react-app search-params-exampleįirst, let's remove what we don’t need from App.js and make a few changes to App.css. Getting Startedįirst, let’s boot up a small React app using create-react-app. We will briefly explore how this is done and then jump into some examples with the React-dependent NPM package React Router that make this process more streamlined. Import YourComponent from '.Retrieving query parameters (also known as search parameters) from a URL in a React application is essentially the same as any JavaScript application. You can use both useParams and useSelector to solve this import from 'react-router-dom' It's somewhat painful for react-router-dom to keep changing syntax and rules. This is for react-router-dom v6 (I highly suggest using functional components for this)
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