Mar 13

Dev Improve Your React App with These Custom Hooks Streamlining Development to Improve EfficiencyIn the ever-evolving landscape of web development, React has emerged as a cornerstone technology, empowering developers to build dynamic and interactive user interfaces with ease. With the introduction of React Hooks, developers gained a powerful toolset for managing state, side effects, and logic within functional components. However, the true potential of React Hooks extends beyond the built-in ones provided by the framework.

In this article, we’ll delve into the world of custom React Hooks – a vast ecosystem of reusable, composable functions that extend the capabilities of React and streamline development workflows. These custom hooks, crafted by developers worldwide, address common challenges, simplify complex tasks, and unlock new possibilities for React applications. Join us on a journey through 11 essential custom React Hooks, each offering insights, examples, and practical applications to elevate your React projects to new heights. Whether you’re a seasoned React developer or just getting started, this guide will equip you with the tools and knowledge needed to harness the full potential of React Hooks in your applications.


The ‘useScript’ hook in React simplifies the dynamic loading of external scripts. With just a few lines of code, developers can effortlessly integrate third-party dependencies into their applications.


import useScript from "react-script-hook"

function Component() {
    const [ loading, error ] = useScript({
        src: "",
        onload: () => console.log("Script loaded")

    if(loading) return <div>Script loading</div>
    if(error) return <div>Error occured</div>

    return (

export default MyComponent;

export default MyComponent;

In this example, the ‘useScript’ hook loads an external script’. The load attribute shows when the foreign script has finished loading. We examine the loading and error flags and show warnings accordingly.


The useLocalStorage hook in React simplifies storing and accessing data in the browser’s localStorage. With a single line of code, it offers a clean API for managing persistent data. For instance:

For installing:

npm i @rehooks/local-storage

For importing:

const [name, setName] = useLocalStorage('username', 'Guest');

Here, ‘username’ is the key in localStorage, and ‘Guest’ is the default value. The hook returns the current value (‘name’) and a function (‘setName’) to update it. This makes handling local storage operations straightforward and concise.

import { useLocalStorage } from "@rehooks/local-storage"

function Component() {
    const [ name, setName, deleteName ] = useLocalStorage("name")

    return (
            <div>Key: "name" | Value: "{name}"</div>
                <button onClick={ ()=> setName("nnamdi")}>Set Name</button>
                <button onClick={deleteName}>Delete Value</button>


The ‘use-mouse-action’ custom React hook is a valuable tool for handling mouse events within React components. With this hook, developers can easily listen to mouse actions such as clicks, mouse downs, and mouse ups, providing enhanced interactivity and user engagement.

This hook offers three distinct functions:

  • useMouseAction: Registers mouse actions on a specific element, allowing developers to respond to various mouse events with custom logic.
  • useMouseDown: Specifically captures mouse down events on an element, enabling targeted interactions and behaviors when the mouse button is pressed.
  • useMouseUp: Captures mouse up events on an element, facilitating responsive feedback and actions when the mouse button is released.

To import:

import { useMouseAction, useMouseDown, useMouseUp } from "use-mouse-action"

For Example:

import { useMouseAction, useMouseDown, useMouseUp } from "use-mouse-action"

function Component() {
    const mouseActionProps = useMouseAction({
        onAction: () => console.log("Mouse clicked")

    const mouseDownProps = useMouseDown(() => console.log("Mouse down"))

    const mouseUpProps = useMouseUp(() => console.log("Mouse up"))

    return (
            <button {...mouseActionProps}>Mouse Action</button>
            <button {...mouseDownProps}>Mouse Down</button>
            <button {...mouseUpProps}>Mouse Up</button>


This React hook enables real-time speech-to-text conversion, leveraging the Web Speech API. Developers can integrate speech recognition functionality into their applications effortlessly. For instance:

import { useSpeechRecognition } from "react-speech-kit"

function Component() {
    const [ result, setResult ] = useState()
    const { listen, listening, stop } = useSpeechRecognition({
        onResult: result => setResult(result)

    return (
            {listening ? "Speak, I'm listening" : ""}
            <textarea value={value} />
            <button onClick={listen}>Listen</button>
            <button onClick={stop}>Stop</button>

This example demonstrates a simple component that starts and stops listening for speech input, providing immediate feedback to the user.


The ‘useNetworkStatus’ hook is a valuable addition to any React application, providing real-time information about the user’s network connection. By accessing properties from the ‘navigator.connection’ object, this hook offers insights into the network environment, empowering developers to tailor their applications accordingly.

For example, consider a messaging application that allows users to send messages in real-time. By utilizing ‘useNetworkStatus’, the application can dynamically adjust its behavior based on the user’s network conditions. If the user has a slow connection, the application can prioritize sending text messages over media files to minimize latency. Conversely, when the user is on a fast connection, the application can optimize media file uploads for quicker delivery.

Here’s a simplified example of how to use ‘useNetworkStatus’:

import useNetworkStatus from "@rehooks/network-status"

function Component() {
    const connection = useNetworkStatus()
    const { effectiveType, saveData, rtt, downlink } = connection;

    return (
            <div>Network: {connection.effectiveType ? "Fast" : "Slow"}</div>
            <div>Data Saver Mode: {saveData ? "Yes" : "No" }</div>

export default NetworkStatusComponent;

The above code simply displays the network status of the user using the ‘useNetworkStatus’ hook.


This React hook enables seamless management of document titles, ensuring consistency between application state and browser tabs. By dynamically updating the title, developers can provide contextually relevant information to users, enhancing overall user experience.


import React from 'react';
import { useDocumentTitle } from '@rehooks/document-title';

const App = () => {
  useDocumentTitle('My Awesome App');

  return (
      <h1>Welcome to My Awesome App!</h1>
      {/* Other components and content */}

export default App;

In this example, the document title will be set to “My Awesome App” when the component mounts, ensuring that users see the appropriate title in their browser tabs.

Wrapping Up

These custom React Hooks are a game changer in modern web development, giving developers unprecedented flexibility and efficiency when creating dynamic user interfaces. By using the power of these hooks, developers may expedite typical operations, improve interaction, and open up new possibilities in React apps. From simplifying script integration with ‘useScript’ to enabling real-time voice recognition with ‘useSpeechRecognition’, the ecosystem of custom hooks is growing, allowing developers to push the boundaries of what is possible with React. Armed with this knowledge, developers are ready to take their projects to new heights, providing richer experiences and fostering innovation in the ever-changing web development industry.

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Dec 13

React Native has become a cornerstone in cross-platform app development, offering flexibility and speed to developers aiming for a native-like experience on diverse devices. Despite its popularity, React Native encounters performance challenges, such as animation handling and limitations in multitasking capabilities. The community’s continuous efforts to enhance React Native are commendable, but incorporating new features sometimes leads to performance bottlenecks.

This article delves into the reasons behind slow React Native app performance and provides an extensive guide on optimizing and boosting the overall efficiency of your applications.

Reasons for Slow React Native App Performance

Understanding the factors contributing to slow performance is crucial before delving into optimization techniques. Several common reasons can hinder the speed of React Native apps:

  • Complex UI: Apps with intricate UI designs, involving numerous nested components, may experience slower rendering times, leading to performance issues.
  • Complex Animations: Poorly implemented or overly intricate animations can significantly slow down component rendering, impacting the overall user experience.
  • Unnecessary Re-renders:Overusing setState or neglecting the shouldComponentUpdate lifecycle method can result in unnecessary re-renders, leading to performance overhead.
  • Optimization Shortcomings: Inadequate optimization practices, such as using inappropriate components or overlooking performance optimization techniques like memoization, can hamper app speed.
  • Complex Calculations: Performing intricate calculations within components can delay rendering and impact overall performance.
  • Data Fetching Impact: Fetching excessive data for a specific component or page can increase loading times and undermine overall performance.

Now that we’ve identified these potential pitfalls, let’s explore strategies to improve React Native app performance.

Ways to Improve React Native App Performance

Network Optimization

Network operations can significantly influence app performance. To optimize network usage, consider the following:

  • Consolidate API calls or adopt more efficient data retrieval approaches to minimize the number of HTTP requests.
  • Implement caching systems to reduce network round-trips, especially for static or less frequently updated data.
  • Leverage libraries like ‘react-native-offline’ or ‘react-native-fast-image’ to enable offline caching and optimize image loading for improved efficiency.

Optimize Launch Speed

The speed at which an app is launched contributes to its overall perceived performance. To enhance launch speed:

  • Optimize rendering to ensure smooth launches by reducing memory usage and minimizing bundle size.
  • Leverage React Native features like Hermes integration and Memoization to improve rendering efficiency.

Improve Debugging Speed

Efficient debugging is essential for maintaining productivity and app speed. Use tools like Flipper, which integrates well with React Native and native app systems. It provides a comprehensive layout, including a network inspector and a detailed log, facilitating efficient debugging.

Cache Image Files

Caching image files is crucial for resolving issues related to loading and re-rendering images from remote endpoints:

  • Implement manual caching by downloading images to local storage in the app’s cache directory, improving loading efficiency.
  • Consider using the ‘react-native-fast-image’ library, which seamlessly handles image caching, enhancing overall image loading performance.
import FastImage from 'react-native-fast-image'

const App = () => (
    style={{ ... }}
      uri: '',
      priority: FastImage.priority.normal,
      cache: FastImage.cacheControl.cacheOnly

Optimize Images

Optimizing images is crucial for preventing delays during app launch:

  • Use SVG for small icons and PNG for detailed images like product photos.
  • Employ lazy-loading techniques for images to defer loading until necessary, minimizing unnecessary network requests.
  • Avoid excessively high resolutions for images.
  • Utilize the WEBP format to reduce image size for both iOS and Android platforms.

Optimize Rendering

Efficient rendering is essential for enhancing app performance:

  • Use the ‘VirtualizedList’ component for efficient rendering of large lists.
  • Minimize unnecessary re-renders by using ‘PureComponent’ or ‘React.memo’ for components.
  • Opt for the Animated API over inline styles to ensure smoother animations.

Memory Management

Effective memory management is pivotal for app performance:

  • Unsubscribe from event listeners, clear intervals, and eliminate object references when no longer required to prevent memory leaks.
  • Limit the usage of the React Native bridge and minimize unnecessary data conversions between JavaScript and native code.
  • Employ efficient data structures and algorithms to decrease memory usage and enhance overall performance.

Remove Unnecessary Libraries and Features

Every additional library contributes to the app’s size and impact. Selectively incorporate only necessary libraries and functionalities:

  • Include only essential features to avoid unnecessary dependencies that can impact screen load times.

Optimize React Native Code

Optimizing code is crucial for managing time and memory resources effectively:

  • Use ‘PureComponent’ for text elements to prevent unnecessary overrides and potential performance impacts.
  • Define functions and code accurately, and introduce the most suitable code for each scenario.

Profile Your App

Profiling your React Native app is crucial for pinpointing and improving performance issues. Profiling tools such as React Native Performance, Flipper, or Chrome DevTools can be employed to analyze CPU usage, rendering speed, and memory consumption. Focus on optimizing functions and components with high execution times, address slow rendering through component optimization, and identify and fix memory leaks. This targeted approach enhances your app’s responsiveness and overall user experience.


In conclusion, ensuring a smooth and responsive user experience in your React Native app is achievable through effective performance optimization. By employing the outlined strategies, developers can refine rendering, minimize app size, adeptly handle memory, optimize code, and streamline network operations. Consistently profiling your app helps identify and address fresh performance issues, allowing for continuous refinement.

A finely tuned React Native app not only meets user expectations but also contributes to the overall success of your application. As mobile users increasingly demand faster and more efficient experiences, developers must prioritize performance optimization as an integral part of the app development lifecycle.

By following these strategies and embracing a proactive approach to performance optimization, developers can create React Native apps that stand out for their speed, efficiency, and delightful user experiences.

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Nov 08

React JS has firmly established itself as a go-to JavaScript library for developing dynamic and user-friendly interfaces. Renowned for its simplicity, flexibility, and commendable performance, React JS introduces developers to two pivotal concepts: state and props. In this comprehensive guide, we’ll delve into the intricacies of these concepts, unraveling their significance in React JS development.

Understanding State in React JS

What is State?

In the realm of React JS, state is a fundamental object that empowers components to store and manage their internal data. Serving as a repository for a component’s current state, it is initialized in the constructor method and can be dynamically updated using the ‘setState()’ method. Crucially, any alteration in a component’s state triggers an automatic re-rendering, ensuring that the UI accurately reflects the modified state.

How Does State Work?

State operates as a mechanism enabling components to independently manage their data. When a component’s state undergoes a transformation, React responds by triggering a re-render, facilitating the creation of dynamic and interactive user interfaces. This intrinsic feature simplifies the development of applications with real-time responsiveness.

How to Use State in Your Code

To harness the power of state in your React components, the initialization process begins in the constructor method:

class MyComponent extends React.Component {
  constructor(props) {
    this.state = {
      count: 0

  handleClick() {
      count: this.state.count + 1

  render() {
    return (
        <p>You clicked {this.state.count} times</p>
        <button onClick={() => this.handleClick()}>
          Click me

In this example, the state of the component is initialized with a single property, ‘count’. The ‘handleClick’ method, invoked when the button is clicked, utilizes ‘setState()’ to increment the ‘count’ property. This dynamic approach to managing state facilitates the creation of responsive interfaces.

Examples of State in Action

  • Toggle a Button: Leverage state to toggle the button’s state between “on” and “off” upon a click event.
  • Display a Counter: Utilize state to keep track of the number of button clicks and dynamically display the count to the user.
  • Show or Hide Content: Leverage state to conditionally render content based on user interaction, providing a seamless and interactive user experience.

Understanding Props in React JS

What are Props?

Props, short for properties, are read-only values that facilitate the transfer of data across React components. Comparable to function arguments in JavaScript or attributes in HTML, props play a crucial role in creating dynamic and data-driven React applications.

How Do You Pass Data with Props?

Passing data with props involves utilizing a syntax akin to HTML attributes. For instance, an object and a number can be passed as props to a child component:

<ChildComponent person={{ name: 'John Doe', age: 30 }} count={10} />

In this example, an object with properties (‘name’ and ‘age’) and a number (‘count’) is passed as props to the ‘ChildComponent’.

Examples of Props in Action

  • Displaying Data: Use props to display data in React components, such as passing an object with user information to a ‘UserProfile’ component to display the user’s name, age, and profile picture.
  • Passing Functions: Pass functions as props to enable child components to communicate with their parent components. For instance, passing a function that updates the state of a parent component to a child component, calling it when a button is clicked.
  • Conditional Rendering: Leverage props for conditional rendering in React components. For example, pass a boolean value as props to a ‘ShowHide’ component and render different content based on whether the value is true or false.

Differences Between State and Props

Despite being fundamental to React JS, state and props exhibit key differences:

  • Ownership: State is owned and managed within the component itself, while props are owned by the parent component and passed down to child components.
  • Mutability: State is mutable and can be changed using the ‘setState()’ method, while props are immutable and cannot be modified by the child component.
  • Access: State is local to the component and can only be accessed and modified within that component. In contrast, props can be accessed by the child component but cannot be modified.
  • Usage: State is utilized to manage data local to the component, whereas props are employed to pass data between components.

State and Props in Harmony

In the symphony of React JS development, state and props harmonize to orchestrate seamless and interactive user experiences. State empowers components to manage their internal data dynamically, enabling responsiveness to user interactions. On the other hand, props facilitate the flow of data across components, fostering consistency and enabling the creation of modular and reusable code.

Best Practices for State and Props Management

Keep State Local: Whenever possible, keep state local to the component that truly needs it. Avoid unnecessary global state management for simpler components.

Props for Communication: Leverage props for communication between parent and child components. This promotes a unidirectional data flow and simplifies the understanding of data sources.

Immutability Matters: When updating state using ‘setState()’, ensure immutability. Create a new object or array with the updated values instead of modifying the existing state directly.

   // Incorrect

   // Correct
     items: [...this.state.items, newItem]

Use Functional setState: When the new state depends on the current state, use the functional form of ‘setState’ to avoid race conditions.

   // Without functional setState
     count: this.state.count + 1

   // With functional setState
   this.setState((prevState) => ({
     count: prevState.count + 1

Destructure Props: When accessing multiple props in a component, consider destructuring them for cleaner and more readable code.

  // Without destructuring
   const Article = (props) => {
     return <h2>{props.title}</h2>;

   // With destructuring
   const Article = ({ title }) => {
     return <h2>{title}</h2>;  


In the grand tapestry of React JS development, state and props emerge as fundamental threads that weave together dynamic, responsive, and modular applications. State empowers components to manage their internal data dynamically, fostering interactive user experiences. In contrast, props facilitate seamless communication between components, enhancing reusability and maintainability.

By adhering to best practices, embracing the innate characteristics of state and props, and exploring their diverse applications, developers can navigate the React JS landscape with confidence. As the React ecosystem evolves, the mastery of state and props remains a cornerstone in the pursuit of creating exceptional and user-centric applications.

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