Redux dispatch input onchange

Redux is a state management library used mostly with React. It helps to manage the state of the application and makes it easier to debug and maintain.

The dispatch function in Redux is used to update the state of the application. In this guide, we will learn how to use dispatch to update the input when its value changes.

Example

Let's start with a simple example. We have an input element in our application and we want to update the state of the application when the input value changes.

import React from 'react';
import { connect } from 'react-redux';

class ExampleComponent extends React.Component {
  handleInputChange = (event) => {
    this.props.dispatch({
      type: 'UPDATE_INPUT',
      payload: event.target.value
    });
  }

  render() {
    return (
      <input type="text" onChange={this.handleInputChange} />
    );
  }
}

export default connect()(ExampleComponent);

In this example, we have a simple input element and an event handler handleInputChange which is called whenever the value of the input changes.

Inside the handleInputChange function, we call the dispatch method with an action type UPDATE_INPUT and a payload containing the value of the input.

This will update the state of the application with the new value of the input.

Connecting with Redux

In order to use dispatch, we need to connect our component with Redux. We can use the connect function provided by the react-redux library to achieve this.

import React from 'react';
import { connect } from 'react-redux';

class ExampleComponent extends React.Component {
  handleInputChange = (event) => {
    this.props.dispatch({
      type: 'UPDATE_INPUT',
      payload: event.target.value
    });
  }

  render() {
    return (
      <input type="text" onChange={this.handleInputChange} />
    );
  }
}

const mapStateToProps = (state) => {
  return {
    value: state.inputValue
  };
};

export default connect(mapStateToProps)(ExampleComponent);

In this example, we have added a mapStateToProps function which maps the state of our application to the props of our component. Here, we are mapping the inputValue of our application to the value prop of our component.

This allows us to access the value of the input as a prop of our component.

Conclusion

In this guide, we learned how to use dispatch to update the state of the application when the value of the input changes. We also learned how to connect our component with Redux using the connect function.

With this knowledge, you can now use Redux to manage the state of your React application with ease.