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Use Object Assign Or Spread Operator In React Redux Which Is A Better Practise

When it comes to working with React and Redux, there are often multiple ways to achieve the same goal. One common scenario developers encounter is when updating state in a Redux store. In this article, we will compare two popular methods for updating state in React Redux: using the Object.assign method and the spread operator. Let's dive in and explore which approach might be the better practice for your project.

Object.assign method

The Object.assign method is a built-in JavaScript function that allows you to create a new object by merging multiple objects together. When it comes to updating state in Redux, Object.assign can be used to create a new object based on the previous state with specific changes applied.

Here's an example of how you might use Object.assign to update state in a Redux reducer:

Javascript

const initialState = {
  count: 0,
};

const reducer = (state = initialState, action) => {
  switch (action.type) {
    case 'INCREMENT':
      return Object.assign({}, state, { count: state.count + 1 });
    default:
      return state;
  }
};

In this example, Object.assign is used to create a new object based on the initial state, with the count property updated based on the action dispatched.

Spread operator

The spread operator, represented by three dots (...), is another method for copying the contents of one object into another. This operator can be a more concise and readable way to update state in Redux compared to Object.assign.

Here's how the same example would look using the spread operator:

Javascript

const initialState = {
  count: 0,
};

const reducer = (state = initialState, action) => {
  switch (action.type) {
    case 'INCREMENT':
      return { ...state, count: state.count + 1 };
    default:
      return state;
  }
};

By using the spread operator, you can achieve the same result as Object.assign but with cleaner and more readable syntax.

Which is better practice?

Both Object.assign and the spread operator are valid ways to update state in a Redux store. However, many developers prefer the spread operator for its simplicity and readability. The spread operator also provides a more concise syntax, which can make your code easier to maintain and understand.

In conclusion, when working with React Redux, using the spread operator to update state is generally considered a better practice due to its cleaner syntax and ease of use. However, the choice between Object.assign and the spread operator ultimately comes down to personal preference and the specific needs of your project.

Experiment with both methods in your Redux reducers and see which one works best for you. Remember, the key is to write code that is clear, maintainable, and easy for you and your team to understand.

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