useRef Hook
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Learn about the useRef hook, which replaces the JavaScript getElementById way
React Hooks Handbook
1
Intro to React Hooks
3:39
2
Create your first React app
4:23
3
React Component
2:54
4
Styling in React
5:06
5
Styles and Props
2:22
6
Understanding Hooks
3:21
7
useState Hook
2:54
8
useEffect Hook
3:41
9
useRef Hook
3:00
10
Props
3:11
11
Conditional Rendering
4:21
12
Load Local Data
4:04
13
Fetch Data from an API
5:40
14
Toggle a state
4:05
15
useInput Hook
6:04
16
Gatsby and React
6:44
17
NextJS and React
5:24
18
React TypeScript Part 1
8:19
19
React TypeScript Part 2
7:35
20
useScrollPosition Hook
4:26
21
useOnScreen hook
8:08
22
useContext Hook
8:32
23
Fragments
2:43
24
Lazy Loading
4:05
25
React Suspense
3:13
26
Environment Variables
4:43
27
Reach Router
5:31
28
URL Params
4:04
29
SEO and Metadata
6:47
30
Favicon
3:03
31
Dynamic Favicon
2:14
32
PropTypes
3:54
33
Custom PropTypes
3:58
34
useMemo Hook
4:05
35
forwardRef Hook
3:28
36
Handling Events
5:44
37
Spread attributes
3:35
38
useMousePosition Hook
4:55
39
useReducer with useContext Part 1
7:33
40
useReducer with useContext Part 2
6:48
41
useReducer with useContext Part 3
5:43
42
Netlify
5:08
43
Gatsby Cloud
6:19
44
Gatsby Plugin Image
8:11
45
useOnClickOutside Hook
6:32
46
useWindowSize Hook
4:14
47
usePageBottom hook
4:48
48
useLocalStorage Hook
5:27
49
Three.js in React Part 1
17:33
50
Three.js in React Part 2
11:18
CodeSandbox link
You can find the full code for this tutorial at https://codesandbox.io/s/useref-hook-0gs62.
Create your component
We'll create a button component. On click of the button, we'll display an alert that says You clicked!.
import React from "react";
const MyButton = () => {
return <button onClick={() => alert("You clicked!")}>Click me</button>;
};
export default MyButton;Import the hook
Import the hook from the React library at the top of your file.
import React, { useRef } from "react"Create a ref
Create a new ref using the useRef hook. In the parentheses, pass in the initial value of your ref. Usually, it'll be null or undefined.
const ref = useRef(null)Then, add the ref to your element.
<button onClick={() => alert("You clicked!")} ref={ref}>
Click me
</button>Print the ref in the console
We'll test if our ref works. To do so, we'll use the useEffect hook.
import React, { useRef, useEffect } from "react"Once the component is mounted, we will print our ref on the console. The useRef always returns a current object. To get the actual HTML element, you need to do ref.current:
useEffect(() => {
if (ref) {
console.log("ref", ref.current);
}
})You should see a HTML button printed on the console:
Use your ref
Finally, you can just use your ref! For example, we can simulate a programmatic click on the button every time the component is mounted with the following code. The alert we added before should show every time you land on the page.
useEffect(() => {
if (ref) {
ref.current.click()
}
})Final code with styling
Here is the final code with styling:
import React, { useRef, useEffect } from "react";
import styled from "styled-components";
const MyButton = () => {
const ref = useRef(null);
useEffect(() => {
if (ref) {
ref.current.click()
}
})
return (
<Button onClick={() => alert("You clicked!")} ref={ref}>
Click me
</Button>
);
};
export default MyButton;
const Button = styled.button`
background: linear-gradient(91.4deg, #2fb8ff 0%, #9eecd9 100%);
padding: 12px 0;
width: 200px;
border: none;
border-radius: 30px;
color: #fff;
font-weight: bold;
font-family: Segoe UI, sans-serif;
cursor: pointer;
:focus {
outline: none;
}
`;Learn with videos and source files. Available to Pro subscribers only.
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Video files, ePub and subtitles
Videos
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Assets
Subtitles
1
Intro to React Hooks
An overview of React Hooks and the frameworks you can use to build your React application blazingly fast
3:39
2
Create your first React app
Create your first React project from the Terminal and save it on your local computer
4:23
3
React Component
Create your first JSX component using React
2:54
4
Styling in React
How to style your React components using inline styling, separate stylesheets or styled-components
5:06
5
Styles and Props
Render different styles depending on different properties passed to your component
2:22
6
Understanding Hooks
Learn about the basics of React Hooks, which introduced at React Conf 2018
3:21
7
useState Hook
Use the useState hook to manage local state in your React component
2:54
8
useEffect Hook
Manage with your component's lifecycle with the useEffect hook
3:41
9
useRef Hook
Learn about the useRef hook, which replaces the JavaScript getElementById way
3:00
10
Props
Learn about props in React to pass data from parent to child components
3:11
11
Conditional Rendering
Render different UIs depending on different conditions and states
4:21
12
Load Local Data
Load local JSON data into your React application
4:04
13
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
14
Toggle a state
Learn how to toggle a state from true to false and back again
4:05
15
useInput Hook
Create a hook to get the value and the onChange event of input fields
6:04
16
Gatsby and React
Create a static content-oriented website using React on Gatsby
6:44
17
NextJS and React
Create your first NextJS React application
5:24
18
React TypeScript Part 1
Learn how to create a React TypeScript application using the Create React App, Gatsby and NextJS methods
8:19
19
React TypeScript Part 2
Learn the basics of TypeScript and how to use TypeScript in a React component
7:35
20
useScrollPosition Hook
Create a custom hook to listen to the current window position of the user
4:26
21
useOnScreen hook
Create a custom hook to listen to when an element is visible on screen
8:08
22
useContext Hook
Manage global states throughout the entire application
8:32
23
Fragments
Group multiple children together with React Fragments
2:43
24
Lazy Loading
Lazy Load heavy components to improve performance
4:05
25
React Suspense
Wait for data with React Suspense and React.lazy
3:13
26
Environment Variables
Make environment variables secret with a .env file
4:43
27
Reach Router
Create a multiple-pages React application with Reach Router
5:31
28
URL Params
Create unique URL with URL Params
4:04
29
SEO and Metadata
Optimize a React application for search engines with React Helmet
6:47
30
Favicon
Add an icon to a React website
3:03
31
Dynamic Favicon
Change the favicon's fill color depending on the user's system appearance
2:14
32
PropTypes
Implement props type-checking with PropTypes
3:54
33
Custom PropTypes
Create a custom PropType using a validator function
3:58
34
useMemo Hook
Prevent unnecessary re-renders when the component stays the same
4:05
35
forwardRef Hook
Forward a ref to a child component
3:28
36
Handling Events
How to handle events in React
5:44
37
Spread attributes
Learn how to make use of the spread operator
3:35
38
useMousePosition Hook
Detect the user's mouse position on a bound element
4:55
39
useReducer with useContext Part 1
Create a reducer to be used in a context
7:33
40
useReducer with useContext Part 2
Incorporate useReducer with useContext
6:48
41
useReducer with useContext Part 3
Connect the context and reducer with the frontend
5:43
42
Netlify
Deploy to production using Netlify
5:08
43
Gatsby Cloud
Deploy to production using Gatsby Cloud
6:19
44
Gatsby Plugin Image
Use gatsby-plugin-image for automatic image resizing, formatting, and higher performance
8:11
45
useOnClickOutside Hook
Toggle a modal visibility with a useOnClickOutside hook
6:32
46
useWindowSize Hook
Create a hook to determine the width and height of the window
4:14
47
usePageBottom hook
Detect if the user scrolled to the bottom of the page
4:48
48
useLocalStorage Hook
Store an item in a browser's local storage
5:27
49
Three.js in React Part 1
Bring your website to life with beautiful 3D objects
17:33
50
Three.js in React Part 2
Bring your website to life with beautiful 3D objects
11:18
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We all try to be consistent with our way of teaching step-by-step, providing source files and prioritizing design in our courses.
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