Browse all JavaScript lessons.

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Get JSON data from an API using fetch

P

Safer property access with Lodash's 'get' method

P

Change Object Properties with Ramda Lenses

P

Ember Templating with HTMLBars

Add and Remove Items in Arrays using Filter, Reject and Partition in Ramda

P

Manipulate the DOM with the classList API

P

Use Jest's Snapshot Testing Feature

P

Use Jest's Interactive Watch Mode

P

Track project code coverage with Jest

P

Add Babel Integration with Jest

P

Test JavaScript with Jest

P

Build a Functional Pipeline with Ramda.js

P

3D Transformation Matrices in WebGL

P

Using a Matrix Library for WebGL

P

User Interaction in WebGL

P

Animating WebGL Vertices

P

Loading in WebGL Shaders

P

Drawing Arrays in WebGL

P

WebGL Vertex Buffers

P

Passing Data to WebGL Shaders

P

Introduction to WebGL Shaders

P

Setting Up WebGL

Make Canvas Responsive to Pixel Ratio

P

Primitive Types in Flow

P

Use the Webpack Dashboard to Monitor Webpack Operations

P

ES6 Parameter Object Destructuring with Required Values

P

Accessible Button Events

Create an Ember Project with the Ember-CLI

Shape Objects in GIF Loop Coder

P

Colors in GIF Loop Coder

P

Introduction to drawing with p5js

P

Outputting Animations from GIF Loop Coder

P

Custom Drawing in GIF Loop Coder

P

GIF Loop Coder - Interpolation

P

GIF Loop Coder Single Mode

P

GIF Loop Coder - Animation Functions

P

GIF Loop Coder - Introduction

The Phase Property in GIF Loop Coder

P

Parenting in GIF Loop Coder

P

GIF Loop Coder - Animating with Arrays

ES6 Rest Parameters

P

Modify Values in an Array with Map

P

Redux: Refactoring the Reducers

Redux: Using withRouter() to Inject the Params into Connected Components

Redux: Dispatching Actions Asynchronously with Thunks

Redux: Filtering Redux State with React Router Params

Redux: Wrapping dispatch() to Log Actions

Redux: Fetching Data on Route Change

Redux: Dispatching Actions with the Fetched Data

Redux: Supplying the Initial State

js tutorial about Get JSON data from an API using fetch

Get JSON data from an API using fetch

1:19 js PRO

We will use fetch to get JSON data from an API. fetch is available globally on the window object in the browser or via libraries in other JS environments.

js tutorial about Safer property access with Lodash's 'get' method

Safer property access with Lodash's 'get' method

8:36 js PRO

Property access in Javascript can be problematic - especially when dealing with nested Objects and Arrays. Doing it manually and in a safe manner requires tons of boilerplate inside conditionals and results in a defensive style of coding. In this lesson we look at why this is a problem & how to overcome it using the get method from the popular utility library Lodash

js tutorial about Change Object Properties with Ramda Lenses

Change Object Properties with Ramda Lenses

4:46 js PRO

In this lesson we'll learn the basics of using lenses in Ramda and see how they enable you to focus changes on specific properties of an object while keeping your data immutable.

js tutorial about Ember Templating with HTMLBars

Ember Templating with HTMLBars

3:42 js

In this lesson, we will learn how templates work within Ember and how to use HTMLBars. This lesson will cover the connection between controllers and templates and how to use actions within templates as well.

js tutorial about Add and Remove Items in Arrays using Filter, Reject and Partition in Ramda

Add and Remove Items in Arrays using Filter, Reject and Partition in Ramda

2:09 js PRO

We'll learn how to get a subset of an array by specifying items to include with filter, or items to exclude using reject. We'll also look at how to get the results from both filter and reject, neatly separated with partition.

js tutorial about Manipulate the DOM with the classList API

Manipulate the DOM with the classList API

3:26 js PRO

Learn how to add, remove and test for CSS classes using the classList API. It's more powerful than using className and doesn't require any dependencies.

js tutorial about Use Jest's Snapshot Testing Feature

Use Jest's Snapshot Testing Feature

3:41 js PRO

Often when testing, you use the actual result to create your assertion and have to manually update it as you make changes to the feature. With Jest snapshot testing, you can let Jest do this part for you and write more tests and features faster and with more confidence. Let's learn about how you can use Jest snapshot testing to improve your own workflow.

js tutorial about Use Jest's Interactive Watch Mode

Use Jest's Interactive Watch Mode

3:17 js PRO

Jest ships with a pretty amazing interactive watch mode which you can initiate with jest --watch. Let's learn about the bits of interactivity and how this can really improve your workflow.

js tutorial about Track project code coverage with Jest

Track project code coverage with Jest

3:07 js PRO

Jest comes pre-packaged with the ability to track code coverage for the modules you're testing, but it takes a little extra work to make it track untested files as well. Let's look at what Jest can do for you, what you have to do yourself, and how to setup code coverage thresholds so you can work to improving the code coverage numbers for your projects.

js tutorial about Add Babel Integration with Jest

Add Babel Integration with Jest

1:42 js PRO

Jest will default to utilize babel when your node_modules contains babel-jest. Depending on your environment this may already be the case! In this quick lesson, find out why that is and how to ensure that continues to work.

js tutorial about Test JavaScript with Jest

Test JavaScript with Jest

4:04 js PRO

Let's learn how to unit test your JavaScript with Jest, a JavaScript unit testing framework from Facebook. We'll install and optimize Jest for this project and see how quick and easy it is to get things going with Jest.

js tutorial about Build a Functional Pipeline with Ramda.js

Build a Functional Pipeline with Ramda.js

5:37 js PRO

We'll learn how to take advantage of Ramda's automatic function currying and data-last argument order to combine a series of pure functions into a left-to-right composition, or pipeline, with Ramda's pipe function.

js tutorial about 3D Transformation Matrices in WebGL

3D Transformation Matrices in WebGL

6:36 js PRO

In this lesson, we look at how to create and apply 3D transformation matrices to rotate and perform other transformations on 3D shapes created in WebgL.

js tutorial about Using a Matrix Library for WebGL

Using a Matrix Library for WebGL

3:57 js PRO

In this lesson, we see the benefits of using a 3rd party 3D matrix library for performing 3D matrix transformations.

js tutorial about User Interaction in WebGL

User Interaction in WebGL

3:10 js PRO

In this lesson we accomplish some simple user interaction with animated 3D vertices.

js tutorial about Animating WebGL Vertices

Animating WebGL Vertices

6:03 js PRO

In this lesson, we take a look at a simple way of animating vertices in WebGL by simply changing the values of vertices.

js tutorial about Loading in WebGL Shaders

Loading in WebGL Shaders

2:28 js PRO

In this lesson we look at a better way of writing WebGL shaders - loading them in from script tags rather than concatenating JavaScript strings.

js tutorial about Drawing Arrays in WebGL

Drawing Arrays in WebGL

3:52 js PRO

In this lesson, we look at the different drawing modes you can use in gl.drawArrays and how to selectively draw subsets of a full vertex array.

js tutorial about WebGL Vertex Buffers

WebGL Vertex Buffers

5:56 js PRO

In this lesson we cover how to pass an entire array of 3d points to a vertex shader, allowing you to render multiple points at once.

js tutorial about Passing Data to WebGL Shaders

Passing Data to WebGL Shaders

5:22 js PRO

In this lesson we cover how to pass data into a WebGL shader from the main JavaScript program.

js tutorial about Introduction to WebGL Shaders

Introduction to WebGL Shaders

6:20 js PRO

In this lesson we learn about the two types of shaders required in WebGL - vertex shaders and fragment shaders. We create one of each and see how those shader programs affect what is drawn on the screen.

js tutorial about Setting Up WebGL

Setting Up WebGL

4:20 js

In this lesson we cover setting up WebGL for use, including creating a canvas, getting the WebGL rendering context and clearing the canvas to a particular color.

js tutorial about Make Canvas Responsive to Pixel Ratio

Make Canvas Responsive to Pixel Ratio

1:06 js PRO

Canvas is great for high performance graphics rendering but by default the results look blocky on phones tablets and laptops with high pixel density or Retina displays. By using canvas width and height attributes and style props we can use window.devicePixelRatio to create a canvas that is responsive to pixel ratio.

js tutorial about Primitive Types in Flow

Primitive Types in Flow

3:44 js PRO

We'll go over some of the built-in types in Flow and how to add them to our projects by adding type annotations to our variables in JavaScript. We'll also learn about type mismatch errors when we give a variable a value that doesn't match its type annotation and how to fix it.

js tutorial about Use the Webpack Dashboard to Monitor Webpack Operations

Use the Webpack Dashboard to Monitor Webpack Operations

4:59 js PRO

Learn how to use the new Webpack Dashboard from Formidable Labs to display a pretty, useful output for monitoring the status of your webpack builds. This command line tool replaces the frequently unhelpful large text dump that webpack generates with a pretty user interface that breaks out useful information and presents it in a way that's easy to understand at a glance.

js tutorial about ES6 Parameter Object Destructuring with Required Values

ES6 Parameter Object Destructuring with Required Values

1:40 js PRO

Not only can you provide default values when using ES6 parameter object destructuring, but you can also require the presence of certain properties

js tutorial about Accessible Button Events

Accessible Button Events

6:57 js

Often buttons need to be handled by JavaScript, and if done improperly it can lead to accessibility issues. In this lesson you will improve a major news organization's global header with some basic HTML and JavaScript.

js tutorial about Create an Ember Project with the Ember-CLI

Create an Ember Project with the Ember-CLI

1:41 js

We will learn how to install Ember-CLI and use it to create a new Ember project. We will also learn how to run the Ember project.

js tutorial about Shape Objects in GIF Loop Coder

Shape Objects in GIF Loop Coder

5:53 js PRO

This lesson is a quick tour of the predefined shape objects in GIF Loop Coder.

js tutorial about Colors in GIF Loop Coder

Colors in GIF Loop Coder

6:28 js PRO

In this lesson we cover the different methods for defining and animating colors in GIF Loop Coder.

js tutorial about Introduction to drawing with p5js

Introduction to drawing with p5js

4:10 js PRO

In this lesson we look at using color and the basic drawing methods of p5js, and how they can be combined to create a simple graphic on the canvas.

js tutorial about Outputting Animations from GIF Loop Coder

Outputting Animations from GIF Loop Coder

5:11 js PRO

Let's discuss all the different formats that GIF Loop Coder can output animations as. We'll also look at different ways to optimize output file size.

js tutorial about Custom Drawing in GIF Loop Coder

Custom Drawing in GIF Loop Coder

4:40 js PRO

We'll look at how you can access the raw HTML5 Canvas in GIF Loop Coder and use it to draw whatever you want, in addition to the animated shapes that are a core part of GLC.

js tutorial about GIF Loop Coder - Interpolation

GIF Loop Coder - Interpolation

6:29 js PRO

This video discusses the default interpolation in GIF Loop Coder, and four distinct ways to change that interpolation to add variety to your animations.

js tutorial about GIF Loop Coder Single Mode

GIF Loop Coder Single Mode

4:34 js PRO

We'll take a look at Single Mode animations and strategies for making this type of animation smoothly loop.

js tutorial about GIF Loop Coder - Animation Functions

GIF Loop Coder - Animation Functions

7:20 js PRO

Animating with arrays is super simple with GIF Loop Coder, but using an animation function can give you the power to create much more complex animations.

js tutorial about GIF Loop Coder - Introduction

GIF Loop Coder - Introduction

6:10 js

In this video, I'll introduce you to the program, GIF Loop Coder, which allows you to make looping animated gifs (and other types of animations) using JavaScript and HTML5 Canvas. We'll cover the basic UI and syntax of how to add objects to the animation list, animate them and save the result as an animated gif.

js tutorial about The Phase Property in GIF Loop Coder

The Phase Property in GIF Loop Coder

5:10 js PRO

In this lesson, we look at one of the most powerful features in GIF Loop Coder, the phase property, which allows you to let different objects run animations shifted in time.

js tutorial about Parenting in GIF Loop Coder

Parenting in GIF Loop Coder

4:02 js PRO

In this lesson, we look at how you can build up complex animations by assigning one shape as the parent of another, creating a branching display tree.

js tutorial about GIF Loop Coder - Animating with Arrays

GIF Loop Coder - Animating with Arrays

5:28 js

In this lesson, we discuss animating using arrays, and how different data types are interpolated while animating.

js tutorial about ES6 Rest Parameters

ES6 Rest Parameters

3:47 js PRO

In this lesson we will go over ES6 or ECMAScript 2015 Rest Parameters. We will cover what they are, how they work, how they compare to the arguments keyword, and why they are more versatile.

js tutorial about Modify Values in an Array with Map

Modify Values in an Array with Map

9:26 js PRO

Map is one of the most useful array methods. It creates a new array with the exact same number of items as the source and can be used to modify values, change their type, add fields to objects, simplify objects etc. In this lesson we focus on practical use-cases for map & see it in conjunction with other array methods.

js tutorial about Redux: Refactoring the Reducers

Redux: Refactoring the Reducers

6:23 js

We will learn how to remove the duplication in our reducer files and how to keep the knowledge about the state shape colocated with the newly extracted reducers.

js tutorial about Redux: Using withRouter() to Inject the Params into Connected Components

Redux: Using withRouter() to Inject the Params into Connected Components

2:58 js

We will learn how to use withRouter() to inject params provided by React Router into connected components deep in the tree without passing them down all the way down as props.

js tutorial about Redux: Dispatching Actions Asynchronously with Thunks

Redux: Dispatching Actions Asynchronously with Thunks

4:44 js

We will learn about “thunks”—the most common way to write async action creators in Redux.

js tutorial about Redux: Filtering Redux State with React Router Params

Redux: Filtering Redux State with React Router Params

4:09 js

We will learn how adding React Router shifts the balance of responsibilities, and how the components can use both at the same time.

js tutorial about Redux: Wrapping dispatch() to Log Actions

Redux: Wrapping dispatch() to Log Actions

4:31 js

We will learn how centralized updates in Redux let us log every state change to the console along with the action that caused it.

js tutorial about Redux: Fetching Data on Route Change

Redux: Fetching Data on Route Change

3:46 js

We will learn how to fire up an async request when the route changes.

js tutorial about Redux: Dispatching Actions with the Fetched Data

Redux: Dispatching Actions with the Fetched Data

6:58 js

We will learn how to dispatch a Redux action after the data has been fetched and recap how to do it when the route changes.

js tutorial about Redux: Supplying the Initial State

Redux: Supplying the Initial State

4:13 js

We will learn how to start a Redux app with a previously persisted state, and how it merges with the initial state specified by the reducers.

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