React Hooks Tutorial for Beginners - useDarkMode()

This React Hook offers you an interface to enable, disable, toggle and read the dark theme mode. The returned value (isDarkMode) is a boolean to let you be able to use with your logic.

It uses internally useLocalStorage() to persist the value and listens the OS color scheme preferences.

The Hook

// See: https://usehooks-ts.com/react-hook/use-local-storage
import { useLocalStorage } from '../useLocalStorage'
// See: https://usehooks-ts.com/react-hook/use-media-query
import { useMediaQuery } from '../useMediaQuery'
// See: https://usehooks-ts.com/react-hook/use-update-effect
import { useUpdateEffect } from '../useUpdateEffect'

const COLOR_SCHEME_QUERY = '(prefers-color-scheme: dark)'

interface UseDarkModeOutput {
  isDarkMode: boolean
  toggle: () => void
  enable: () => void
  disable: () => void
}

function useDarkMode(defaultValue?: boolean): UseDarkModeOutput {
  const isDarkOS = useMediaQuery(COLOR_SCHEME_QUERY)
  const [isDarkMode, setDarkMode] = useLocalStorage<boolean>(
    'darkMode',
    defaultValue ?? isDarkOS ?? false,
  )

  // Update darkMode if os prefers changes
  useUpdateEffect(() => {
    setDarkMode(isDarkOS)
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [isDarkOS])

  return {
    isDarkMode,
    toggle: () => setDarkMode(prev => !prev),
    enable: () => setDarkMode(true),
    disable: () => setDarkMode(false),
  }
}

export default useDarkMode

Usage

import React from 'react'

import { useDarkMode } from 'usehooks-ts'

export default function Component() {
  const { isDarkMode, toggle, enable, disable } = useDarkMode()

  return (
    <div>
      <p>Current theme: {isDarkMode ? 'dark' : 'light'}</p>
      <button onClick={toggle}>Toggle</button>
      <button onClick={enable}>Enable</button>
      <button onClick={disable}>Disable</button>
    </div>
  )
}

Original article source at https://usehooks-ts.com

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How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

• Performance: It delivers optimal performance.
• Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
• UI design: React Native enables you to design simple and responsive UI for your mobile app.
• 3rd party plugins: This framework supports 3rd party plugins.
• Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

• Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
• Near-native user experience: React Native provides several native components, and these are platform agnostic.
• The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

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What are hooks in React JS? - INFO AT ONE

In this article, you will learn what are hooks in React JS? and when to use react hooks? React JS is developed by Facebook in the year 2013. There are many students and the new developers who have confusion between react and hooks in react. Well, it is not different, react is a programming language and hooks is a function which is used in react programming language.
Read More:- https://infoatone.com/what-are-hooks-in-react-js/

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Learn React JS Hooks | React Hooks Tutorial | React Hooks Explained | React Hooks for Beginners

Learn React JS Hooks | React Hooks Tutorial | React Hooks Explained | React Hooks for Beginners

This video is a complete React Hooks Crash Course for beginners in. React hooks are building blocks of function component. We will cover each react hook with detailed explanation and examples. We will see how when we should use any react hook and when not. At last we will build a custom react hook.

🔥 Video contents... ENJOY 👇 

• 0:00:00 - Intro 
• 0:02:22 - useState 
• 0:18:38 - useEffect 
• 0:28:31 - useRef 
• 0:38:33 - useMemo 
• 0:49:16 - useCallback 
• 0:58:56 - useContext 
• 1:08:45 - useReducer 
• 1:24:16 - Build Custom React Hook 
• 1:36:47 - Outro

***Checkout my crash courses for get started with web development*** 

• HTML5 Crash Course in 1 Hour - https://youtu.be/Aj3QFsmsagc 
• CSS Crash Course in 1 Hour - https://youtu.be/nYsk_U_A_lc 
• JavaScript Tutorial in 2 Hours - https://youtu.be/sptS-bgg8Ro 

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Data Visualization in R with ggplot2: A Beginner Tutorial

A famous general is thought to have said, “A good sketch is better than a long speech.” That advice may have come from the battlefield, but it’s applicable in lots of other areas — including data science. “Sketching” out our data by visualizing it using ggplot2 in R is more impactful than simply describing the trends we find.

This is why we visualize data. We visualize data because it’s easier to learn from something that we can see rather than read. And thankfully for data analysts and data scientists who use R, there’s a tidyverse package called ggplot2 that makes data visualization a snap!

In this blog post, we’ll learn how to take some data and produce a visualization using R. To work through it, it’s best if you already have an understanding of R programming syntax, but you don’t need to be an expert or have any prior experience working with ggplot2

#data science tutorials #beginner #ggplot2 #r #r tutorial #r tutorials #rstats #tutorial #tutorials

Validating React Forms With React-Hook-Form

Validating inputs is very often required. For example, when you want to make sure two passwords inputs are the same, an email input should in fact be an email or that the input is not too long. This is can be easily done using React Hook From. In this article, I will show you how.

Required Fields

The most simple, yet very common, validation is to make sure that an input component contains input from the user. React Hook Form basic concept is to register input tags to the form by passing register() to the tag’s ref attribute. As we can see here:

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