How to clear useselector in react

To reset the useSelector value when redirecting from one component to another and passing a payload later, you can follow these steps:

1. Reset the Redux state when redirecting: Dispatch an action to reset the specific part of the Redux state in a useEffect when the component mounts (right after the redirection).
2. Pass payloads on events like a click event: When the user clicks a button or triggers another event, dispatch an action that updates the Redux store with the new payload.

Here’s how you can implement this:

Step-by-step Approach

1. Dispatch a reset action on component mount (after redirect):

In your first component (the one you’re redirecting from), you can use useNavigate or any other routing mechanism to redirect. In the second component (the target component), you can dispatch an action to reset the state inside useEffect to ensure that it gets reset the first time it renders.

2. Handle click events to pass a payload:

Inside your second component (or any other component), dispatch an action with a payload during an event like a click.

Example Code

Redux Action:

Create an action to reset and another action to update the value with a payload:

// actions.js
export const resetValue = () => ({
  type: 'RESET_VALUE',
});

export const updateValue = (payload) => ({
  type: 'UPDATE_VALUE',
  payload,
});

Redux Reducer:
Modify the reducer to handle both actions:

// reducer.js
const initialState = {
  myValue: '',
};

const myReducer = (state = initialState, action) => {
  switch (action.type) {
    case 'RESET_VALUE':
      return {
        ...state,
        myValue: '',
      };
    case 'UPDATE_VALUE':
      return {
        ...state,
        myValue: action.payload,
      };
    default:
      return state;
  }
};

export default myReducer;

First Component (Before Redirect):
Here you can handle the redirection (e.g., using useNavigate if you’re using react-router):

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

const FirstComponent = () => {
  const navigate = useNavigate();

  const handleRedirect = () => {
    // Redirect to the second component
    navigate('/second-component');
  };

  return (
    <button onClick={handleRedirect}>Go to Second Component</button>
  );
};

export default FirstComponent;

Second Component (After Redirect):
Here you reset the value on the first render and pass a payload when a button is clicked:

import React, { useEffect } from 'react';
import { useDispatch, useSelector } from 'react-redux';
import { resetValue, updateValue } from './store/actions';

const SecondComponent = () => {
  const dispatch = useDispatch();
  const mySelectorValue = useSelector(state => state.myValue);

  // Reset value on the first render after redirect
  useEffect(() => {
    dispatch(resetValue());
  }, [dispatch]);

  // Handle click event to update the value with a payload
  const handleClick = () => {
    const newPayload = 'New Data';
    dispatch(updateValue(newPayload));
  };

  return (
    <div>
      <p>Value: {mySelectorValue}</p>
      <button onClick={handleClick}>Update Value with Payload</button>
    </div>
  );
};

export default SecondComponent;

Describe:

1. First Component: When the user clicks the button, it redirects to the second component.
2. Second Component: On the first render, useEffect dispatches the resetValue action to clear the Redux value. Later, on a button click, the updateValue action is dispatched to update the Redux state with a payload.

This setup ensures that your useSelector value is reset when the component loads after redirection and can be updated with a payload based on user interactions (like clicking a button).

Keep Learning 🙂