Exploring the New Hooks in React 18: Examples and Use Cases

Today we are going to talk about New Most important updates in React which are related to hooks which can be asked in interview questions.

Before starting. If you want to be the part of CODE Culture Community. Just fill out the form to join the Free Code Culture Sessions on Sunday and get your questions answered about coding and career. I am form click me

React 18 is just around the corner and promises to bring a lot of new features and improvements to the popular front-end library. One of the most exciting additions to React 18 is the introduction of new hooks, which will make it even easier for developers to build powerful and flexible applications with React.

In this article, we’ll take a closer look at some of the new hooks coming to React 18 and how they can be used to streamline your development workflow. We’ll also provide code examples for each of the new hooks.

1. useEventCallback

The useEventCallback hook is a new addition to React 18 that allows you to create event callbacks that are stable across re-renders. This is especially useful when working with event handlers in React, as it can help prevent unnecessary re-renders and improve performance.

javascriptCopy code
import { useEventCallback } from 'react';

function MyComponent() {
  const handleClick = useEventCallback(() => {
    // Handle click event
  });
  return (
    <button onClick={handleClick}>Click me</button>
  );
}

In the example above, we define a handleClick function using useEventCallback, which will remain stable across re-renders. We can then pass this function as a prop to child components, knowing that it will not cause unnecessary re-renders.

2. useSyncExternalStore

The useSyncExternalStore hook is another new addition to React 18 that allows you to synchronize state between your React components and external data stores. This is particularly useful when working with complex data that needs to be shared between multiple components.

javascriptCopy code
import { useSyncExternalStore } from 'react';

function MyComponent() {
  const [value, setValue] = useSyncExternalStore('myData', 'defaultValue');
  return (
    <div>
      <p>Value: {value}</p>
      <button onClick={() => setValue('new value')}>Update value</button>
    </div>
  );
}

In the example above, we use useSyncExternalStore to synchronize a value named 'myData' with an external data store. The useSyncExternalStore hook returns an array containing the current value and a setter function, which we can use to update the value.

3. useDeferredValue

The useDeferredValue hook is a new addition to React 18 that allows you to defer updates to state until the browser is idle. This can help improve performance by reducing the number of unnecessary re-renders that can occur when updating state.

javascriptCopy code
import { useState, useDeferredValue } from 'react';

function MyComponent() {
  const [value, setValue] = useState('');
  const deferredValue = useDeferredValue(value, { timeoutMs: 100 });
  return (
    <div>
      <input type="text" value={value} onChange={(e) => setValue(e.target.value)} />
      <p>Value: {deferredValue}</p>
    </div>
  );
}

In the example above, we use useDeferredValue to defer updates to the value state until the browser is idle. The useDeferredValue hook takes an optional options object that allows you to customize the delay time and other options.

In conclusion, the new hooks coming to React 18 promise to make it even easier to build powerful and flexible applications with React. By leveraging these new hooks, you can improve the performance and flexibility of your React applications and streamline your development workflow.

if you have any questions or suggestions just do let me know on my Instagram or at codeculturepro@gmail.com