Toggle a state

Add to favorites

Learn how to toggle a state from true to false and back again

React Hooks Handbook

Intro to React Hooks

3:39

Create your first React app

4:23

React Component

2:54

Styling in React

5:06

Styles and Props

2:22

Understanding Hooks

3:21

useState Hook

2:54

useEffect Hook

3:41

useRef Hook

3:00

Props

3:11

Conditional Rendering

4:21

Load Local Data

4:04

Fetch Data from an API

5:40

Toggle a state

4:05

useInput Hook

6:04

Gatsby and React

6:44

NextJS and React

5:24

React TypeScript Part 1

8:19

React TypeScript Part 2

7:35

useScrollPosition Hook

4:26

useOnScreen hook

8:08

useContext Hook

8:32

Fragments

2:43

Lazy Loading

4:05

React Suspense

3:13

Environment Variables

4:43

Reach Router

5:31

URL Params

4:04

SEO and Metadata

6:47

Favicon

3:03

Dynamic Favicon

2:14

PropTypes

3:54

Custom PropTypes

3:58

useMemo Hook

4:05

forwardRef Hook

3:28

Handling Events

5:44

Spread attributes

3:35

useMousePosition Hook

4:55

useReducer with useContext Part 1

7:33

useReducer with useContext Part 2

6:48

useReducer with useContext Part 3

5:43

Netlify

5:08

Gatsby Cloud

6:19

Gatsby Plugin Image

8:11

useOnClickOutside Hook

6:32

useWindowSize Hook

4:14

usePageBottom hook

4:48

useLocalStorage Hook

5:27

Three.js in React Part 1

17:33

Three.js in React Part 2

11:18

CodeSandbox link

You can find the full code for this tutorial at https://codesandbox.io/s/toggle-a-state-ymr4s.

Create your component

Create your NavigationButton component. It will accept three props: an onClick event, an image and a title. Read more about props in the Props section of this handbook.

// NavigationButton.js

import React from "react";
import styled from "styled-components";

const NavigationButton = (props) => {
    return (
        <div onClick={props.onClick}>
            <img src={props.image} />
            <p>{props.title}</p>
        </div>
    );
};

export default NavigationButton;

I'll create a menuData file to save our menu data. Read the section Load Local Data in this handbook to learn how to load local data into your application.

// menuData.js

export const menuData = [
    {
        title: "Courses",
        image: "https://designcode.io/images/icons/courses.svg"
    },
    {
        title: "Tutorials",
        image: "https://designcode.io/images/icons/tutorials.svg"
    },
    {
        title: "Livestreams",
        image: "https://designcode.io/images/icons/livestreams.svg"
    },
    {
        title: "Pricing",
        image: "https://designcode.io/images/icons/pricing.svg"
    }
];

Next, we'll need to create our Menu component.

// Menu.js

import React from "react";
import styled from "styled-components";
import { menuData } from "./menuData";
import NavigationButton from "./NavigationButton";

const Menu = () => {
    return (
        <div>
            <NavigationButton
                title="Menu"
                image="https://designcode.io/images/icons/courses.svg"
            />
            <div>
                {menuData.map((menu, index) => (
                    <NavigationButton
                        key={index}
                        title={menu.title}
                        image={menu.image}
                     />
                ))}
            </div>
        </div>
    );
};

export default Menu;

Create a state

Now, it's time to create our state. Import useState from the React library. You can learn more about this hook in the useState Hook section of this handbook.

// Menu.js

import React, { useState } from "react"

Then, create a state with the useState hook. We'll set it to false initially - so the menu is closed initially.

// Menu.js

const [isOpen, setIsOpen] = useState(false)

Display the menu

Next, we need to add some conditional rendering. You can read more about it in the Conditional Rendering section of this handbook. We only want to display the menu when the isOpen state is true, so let's only display the loop if isOpen is true.

// Menu.js

{isOpen && (
    <div>
				{menuData.map((menu, index) => (
						<NavigationButton
              key={index}
              title={menu.title}
              image={menu.image}
            />
        ))}
		</div>
)}

Add an onClick event

Finally, the most important part: we need to add an onClick even on the first NavigationButton, like so:

onClick={() => setIsOpen(!isOpen)}

This will allow the toggle of the isOpen state. The exclamation point in front of isOpen tells the program to always set the state to the opposite of the current isOpen state.

Congratulations! You just coded a menu open and close on click of the button! You can find the final code with styling below.

Final code with styling

The final code for the NavigationButton will look like this, along with styling using styled-components:

// NavigationButton.js

import React from "react";
import styled from "styled-components";

const NavigationButton = (props) => {
    return (
        <Wrapper onClick={props.onClick}>
            <Image src={props.image} />
            <Title>{props.title}</Title>
        </Wrapper>
    );
};

export default NavigationButton;

const Wrapper = styled.button`
    display: flex;
    background: none;
    border: none;
    border-radius: 14px;
    padding: 10px 20px;
    transition: 0.3s ease-in-out;
    cursor: pointer;
    background-blend-mode: overlay;

    p {
        transition: 0.3s ease-in-out;
    }

    :hover {
        background: rgba(255, 255, 255, 0.2);
        box-shadow: 0px 20px 40px rgba(31, 47, 71, 0.25), 0px 1px 5px rgba(0, 0, 0, 0.1), inset 0 0 0 0.5px rgba(255, 255, 255, 0.4);

        p {
          color: #fff;
          transform: translateY(-1px);
        }
    }

    :focus {
        outline: none;
    }
`;

const Image = styled.img`
    margin: auto;
    height: 24px;
    width: 24px;
    object-fit: cover;
`;

const Title = styled.p`
    align-items: center;
    color: #ffffff;
    text-align: center;
    margin: auto;
    margin-left: 10px;
`;

The final code for the Menu component will look like this, along with styling using styled-components:

// Menu.js

import React, { useState } from "react";
import styled from "styled-components";
import { menuData } from "./menuData";
import NavigationButton from "./NavigationButton";

const Menu = () => {
    const [isOpen, setIsOpen] = useState(false);

    return (
        <Wrapper>
            <NavigationButton
                onClick={() => setIsOpen(!isOpen)}
                title="Menu"
                image="https://designcode.io/images/icons/courses.svg"
            />
            {isOpen && (
                <NavigationWrapper>
                    {menuData.map((menu, index) => (
                        <NavigationButton
                            key={index}
                            title={menu.title}
                            image={menu.image}
                        />
                    ))}
                </NavigationWrapper>
            )}
        </Wrapper>
    );
};

export default Menu;

const Wrapper = styled.div`
    display: grid;
    justify-items: center;
`;

const NavigationWrapper = styled.div`
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0px 20px 40px rgba(31, 47, 71, 0.25), 0px 1px 5px rgba(0, 0, 0, 0.1), inset 0 0 0 0.5px rgba(255, 255, 255, 0.4);
    border-radius: 20px;
    padding: 20px 20px;
`;

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Video files, ePub and subtitles

Videos

ePub

Assets

Subtitles

Intro to React Hooks

An overview of React Hooks and the frameworks you can use to build your React application blazingly fast

3:39

Create your first React app

Create your first React project from the Terminal and save it on your local computer

4:23

React Component

Create your first JSX component using React

2:54

Styling in React

How to style your React components using inline styling, separate stylesheets or styled-components

5:06

Styles and Props

Render different styles depending on different properties passed to your component

2:22

Understanding Hooks

Learn about the basics of React Hooks, which introduced at React Conf 2018

3:21

useState Hook

Use the useState hook to manage local state in your React component

2:54

useEffect Hook

Manage with your component's lifecycle with the useEffect hook

3:41

useRef Hook

Learn about the useRef hook, which replaces the JavaScript getElementById way

3:00

Props

Learn about props in React to pass data from parent to child components

3:11

Conditional Rendering

Render different UIs depending on different conditions and states

4:21

Load Local Data

Load local JSON data into your React application

4:04

Fetch Data from an API

Learn the basics of asynchronous functions and promises by fetching data from an API using fetch, useEffect and useState

5:40

Toggle a state

Learn how to toggle a state from true to false and back again

4:05

useInput Hook

Create a hook to get the value and the onChange event of input fields

6:04

Gatsby and React

Create a static content-oriented website using React on Gatsby

6:44

NextJS and React

Create your first NextJS React application

5:24

React TypeScript Part 1

Learn how to create a React TypeScript application using the Create React App, Gatsby and NextJS methods

8:19

React TypeScript Part 2

Learn the basics of TypeScript and how to use TypeScript in a React component

7:35

useScrollPosition Hook

Create a custom hook to listen to the current window position of the user

4:26

useOnScreen hook

Create a custom hook to listen to when an element is visible on screen

8:08

useContext Hook

Manage global states throughout the entire application

8:32

Fragments

Group multiple children together with React Fragments

2:43

Lazy Loading

Lazy Load heavy components to improve performance

4:05

React Suspense

Wait for data with React Suspense and React.lazy

3:13

Environment Variables

Make environment variables secret with a .env file

4:43

Reach Router

Create a multiple-pages React application with Reach Router

5:31

URL Params

Create unique URL with URL Params

4:04

SEO and Metadata

Optimize a React application for search engines with React Helmet

6:47

Favicon

Add an icon to a React website

3:03

Dynamic Favicon

Change the favicon's fill color depending on the user's system appearance

2:14

PropTypes

Implement props type-checking with PropTypes

3:54

Custom PropTypes

Create a custom PropType using a validator function

3:58

useMemo Hook

Prevent unnecessary re-renders when the component stays the same

4:05

forwardRef Hook

Forward a ref to a child component

3:28

Handling Events

How to handle events in React

5:44

Spread attributes

Learn how to make use of the spread operator

3:35

useMousePosition Hook

Detect the user's mouse position on a bound element

4:55

useReducer with useContext Part 1

Create a reducer to be used in a context

7:33

useReducer with useContext Part 2

Incorporate useReducer with useContext

6:48

useReducer with useContext Part 3

Connect the context and reducer with the frontend

5:43

Netlify

Deploy to production using Netlify

5:08

Gatsby Cloud

Deploy to production using Gatsby Cloud

6:19

Gatsby Plugin Image

Use gatsby-plugin-image for automatic image resizing, formatting, and higher performance

8:11

useOnClickOutside Hook

Toggle a modal visibility with a useOnClickOutside hook

6:32

useWindowSize Hook

Create a hook to determine the width and height of the window

4:14

usePageBottom hook

Detect if the user scrolled to the bottom of the page

4:48

useLocalStorage Hook

Store an item in a browser's local storage

5:27

Three.js in React Part 1

Bring your website to life with beautiful 3D objects

17:33

Three.js in React Part 2

Bring your website to life with beautiful 3D objects

11:18

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