We have two methods for routing navigation using V6 in ReactJs, so let's go to know what are the methods:

To prevent routing transition or navigation in React JS using v6 of the React Router library, you can use the `useNavigate()` hook provided by the library. The `useNavigate()` hook returns a navigate function that you can use to navigate programmatically to a different location.

To prevent the navigation, you can call the `preventDefault()` method on the event object passed to the click handler of the button or link that triggers the navigation.

import { useNavigate } from 'react-router-dom';

    event.preventDefault(); // Prevent the default navigation behavior

    // Do some validation or other logic here

    // If everything is okay, navigate to the new location

    <button onClick={handleClick}>Navigate to new location</button>

In the example above, the `handleClick()` function is called when the user clicks on the button. The `event.preventDefault()` line prevents the default navigation behavior. You can add your own validation or logic to check if the navigation should be allowed. If everything is okay, you can call the `navigate()` function to navigate to the new location. If not, you can show an error message or do something else.

If you want to prevent navigation based on some condition, you can also use the useBlocker() hook provided by the React Router library. The useBlocker() hook allows you to block or prevent navigation based on some condition.

import { useBlocker, useNavigate } from 'react-router-dom';

    // You can add your own condition to block the navigation

      return "Are you sure you want to leave?";

In the example above, the `useBlocker()` hook is called with a function that takes the location and action parameters. The function returns a string if the navigation should be blocked, or null if it should be allowed.

You can add your own condition to block the navigation. For example, you can check if the user has unsaved changes on the current page. If there are unsaved changes, you can return a string with a confirmation message asking the user if they really want to leave the page. If there are no unsaved changes, you can return null to allow the navigation.

In this way, you can prevent routing transitions or navigation in React JS using v6 of the React Router library, either by using the `preventDefault()` method and the `useNavigate()` hook, or by using the `useBlocker()` hook.

In this article, I will explain how to prevent routing transition or navigation in ReactJS using V6.

How to prevent routing transition or navigation using V6 in ReactJs

programmatically navigate using React Router:

To programmatically navigate using React Router, you can use the history object that's provided by the BrowserRouter component. The history object represents the current browser history and allows you to navigate to different URLs, go back or forward, and so on.

Here's an example of how to navigate to a different URL programmatically:

import { useHistory } from 'react-router-dom';

In this example, we're using the useHistory hook to get access to the history object. Then, when the button is clicked, we call the push method on the history object to navigate to the /new-url URL.

You can also use the replace method instead of push if you want to replace the current URL in the history stack rather than adding a new entry.

Additionally, you can use the goBack and goForward methods to go back or forward in the history stack:

Keep in mind that in order to use useHistory hook, the component using it should be rendered as a descendant of a <Router> component from the react-router-dom package.

Using useHistory with a functional component :

Here's an example of how to use the useHistory hook with a functional component:

And here's an example of how to use the history object with a class component:

import { withRouter } from 'react-router-dom';

class MyComponent extends React.Component {

In this example, we're using the withRouter higher-order component from react-router-dom to inject the history object as a prop into the MyComponent class. Then, we can access the history object using this.props.history and call the push method to navigate to the /new-url URL.

In this article, we will discuss how to programmatically navigate using React router.

Programmatically navigate using React router

To mock the useParams() function from Next.js when writing tests with Jest, you can create a manual mock for the react-router-dom package, as Next.js uses react-router-dom under the hood for routing. Here's an example of how you can do it:

1. Create a __mocks__ directory in the same directory as your test file (if it doesn't already exist).

2. Inside the __mocks__ directory, create a file named react-router-dom.js.

3. In the react-router-dom.js file, define a mock implementation for the useParams() function. You can use Jest's jest.fn() to create a mock function that returns a predefined value.

Here's an example of what the react-router-dom.js file might look like:

export const useParams = jest.fn().mockReturnValue({

4. In your test file, import and use the mocked useParams() function instead of the original one. You will also need to instruct Jest to use the manual mock by using the jest.mock() function.

Here's an example of a test file that mocks the useParams() function:

import { render } from '@testing-library/react';

import { useParams } from 'react-router-dom';

// Instruct Jest to use the manual mock for react-router-dom

test('renders component with mocked parameters', () => {

  // Set up any necessary test data or context

  // Render your component that uses useParams()

  // Assert the expected behavior of your component based on the mocked parameters

In this example, the useParams() function is mocked to always return { id: 'mockedId' }. You can customize the mocked parameters as needed for your specific test case.

With this setup, when you run your tests, the useParams() function in your component will be replaced with the mock implementation, allowing you to control the parameters returned by useParams() and test different scenarios.

Describe the above code snippets and functions:

In Next.js, the useParams() hook is a feature provided by the react-router-dom library, which is used for routing in Next.js applications. It allows you to access the dynamic parameters from the URL in your components.

When writing tests for components that use useParams(), you may want to mock this hook to control the values returned during testing. By mocking useParams(), you can provide predefined parameter values that simulate different scenarios, allowing you to test how your component behaves with different URL parameters.

To mock useParams() with Jest, you need to create a manual mock for the react-router-dom package. The manual mock is a file that Jest will use instead of the actual module during testing. Inside this mock file, you define a mock implementation for the useParams() function using jest.fn(), which creates a mock function that you can configure to return specific values.

In the manual mock, you can specify the parameter values that you want to mock. For example, if your component expects an id parameter, you can set the return value of useParams() to { id: 'mockedId' }. This way, whenever your component calls useParams(), it will receive the mocked parameters instead of the real ones.

In your test file, you need to import the useParams() hook from react-router-dom, and then instruct Jest to use the manual mock by calling jest.mock('react-router-dom'). This tells Jest to replace the original useParams() function with the mock implementation defined in the manual mock file.

After mocking useParams(), you can write your test cases and control the behavior of the component based on the mocked parameters. You can use useParams.mockReturnValue() to configure the mock function to return different values for different test cases.

By mocking useParams(), you can isolate your component and test different scenarios without relying on actual URL parameters. This allows you to write focused tests and ensure that your component behaves correctly under different parameter conditions.

Remember to customize the mocked parameters and assertions based on your specific test requirements. The example provided demonstrates the basic setup for mocking useParams() in Next.js tests with Jest.

In conclusion, when writing tests for Next.js components that use the useParams() hook, you can mock it with Jest by creating a manual mock for react-router-dom. This allows you to provide predefined parameter values and simulate different scenarios during testing. By mocking useParams(), you can control the behavior of your components and write focused tests to ensure their correct functionality.

Mock Next.js useParams() with Jest by creating a manual mock for react-router-dom and defining a mock implementation.

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Trending Blogposts on react-router-dom

How to prevent routing transition or navigation using V6 in ReactJs

Programmatically navigate using React router

Mocking Next.js useParams() in Jest

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