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To demonstrate this I have created another Directory named Pizza which contains code for pizzaReducer.js, pizzaActionsType.js, and pizzaActions.js. Multiple Reducers: In most cases, we have to use multiple reducers in order to separate states and actions. Notice we haven’t passed any parameter this time. Then the burgerReducer() function will be called which will accept an initial state and action as a parameter and then increase the numberOfBurger from the initial value to +5.Then the increaseBurgerAction() of burgerActions.js file will be called which will return action_type and ‘5’ as a payload to reducer function.First we call (5) in Button from our component.Notice how we pass number ‘5’ as an parameter ,this parameter will be supplied to increaseBurgerAction(parameter) function of mapDispatchToProps function.connect: This is a ‘react-redux’ inbuilt function used to connect screen component to mapStateToProps and mapDispatchToProps.Always pass mapStateToProps as a first parameter and mapDispatchToProps as the second parameter to connect() function otherwise it will generate an error.We can also rename this other than mapDispatchToProps. mapDispatchToProps: This function maps the actions to the screen component to be called using props.We can also rename this other than mapStateToProps. mapStateToProps: This function maps the store state to the screen component to be used as props.Render: This is called when the state of the store changes.MVVM (Model View ViewModel) Architecture Pattern in Android.Must use JavaScript Array Functions – Part 3.Most useful JavaScript Array Functions – Part 2.How to check if a variable is an array in JavaScript?.Check if an array is empty or not in JavaScript.Split an array into chunks in JavaScript.JavaScript | Split a string with multiple separators.How to make first letter of a string uppercase in JavaScript ?.How to convert string to camel case in JavaScript ?.How to select a random element from array in JavaScript ?.How to generate random number in given range using JavaScript?.JavaScript | Math Object Complete Reference.What are the builtin strings in JavaScript ?.ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.