Science Knowings: JavaScript Course For Social Media

Higher-Order Components (HOCs)

Introduction to Higher-Order Components

In our previous session, we explored Controlled and Uncontrolled Components. Today, let's dive into Higher-Order Components or HOCs.

What is a Higher-Order Component?

A Higher-Order Component is a function that takes a component as an input and returns a new component.

Why Use Higher-Order Components?

HOCs offer several advantages:

  • Code Reusability
  • Extensibility
  • Code Maintainability
  • Testability

Creating a Higher-Order Component

Higher-Order Components can be created using either function or class components.

HOCs with Function Components

const withLogging = (Component) => {
  return (props) => {

HOCs with Class Components

class withLogging extends React.Component {
  render() {

Composition vs Inheritance

HOCs promote composition over inheritance, making it easier to combine and reuse functionality.

Common Use Cases for HOCs

  • Wrapping API Calls
  • Adding Functionality to Components
  • Creating Custom Hooks

Wrapping API Calls

HOCs can be used to wrap API calls, simplifying component code and centralizing data fetching logic.

Adding Functionality to Components

HOCs allow you to add additional functionality to existing components without modifying the original code.

Creating Custom Hooks

HOCs can be used as building blocks for creating custom hooks, providing reusable functionality in a more concise way.

Next Topic: React Fragments

In the next session, we'll introduce React Fragments, a powerful tool for grouping elements without adding extra DOM nodes.

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