The best way to learn what Phoenix LiveView can do is to see it in action!
When it comes to a new technology, there are few things more frustrating than hearing "it's a game-changer!" but having no idea:
- What It Is
- How It Works
- What You Can Do With It!
This LiveView video course focuses on two main things: super clear explanations and loads of practical examples. Then you'll know for certain if it's right for you and, if so, how to use it in your application.
“Holy moly! You have the best walkthroughs, explanations and tips from any videos I've seen about this beautiful piece of technology. It's an invaluable resource!”
You'll find out how LiveView works under the hood, what's on the wire, and have a solid understanding of the programming model. Nothing is left behind the scenes as “magic.”
The real-life examples explore how LiveView solves all sorts of common UI challenges. By seeing LiveView used in many diverse situations, you'll quickly build up a strong intuition for when and how to use it.
For Phoenix developers who want to improve their apps (and their lives!), there isn't a tool more important right now than LiveView!
“This course is fantastic! It has helped me understand LiveView so much better. I love how you not only show us how to do the LiveView stuff but also explain the mechanisms behind it.”
New to LiveView?
Here's the quick lowdown.
- both client and server in sync, always and seamlessly
- persistent connections highly-optimized for web scale
- robust and resilient UIs so you can rock and roll
- a unified code base that's easier to maintain
Oh yeah, and LiveView also has a simple (almost addictive) programming model which makes it a really fun library to use.
But reading about LiveView doesn't come close to seeing it in action. So the first video in the course compares and contrasts LiveView with something you already know:
Videos just the way you like 'em: easy to digest, straight to the point, and paced for experience developers.
See how LiveView offers a unique and refreshing way to build interactive, real-time applications at scale on the super-charged Elixir/Phoenix platform. This is revolutionary stuff!
Our first example is a simple light controller that reacts to user events: turning the light on and off, and dimming it up and down. Building this from scratch is a great way to get our feet wet with LiveView's simple programming model using mount, render, and handle_event callbacks. (Live Demo)
No hand-waving in this course! We take a deep-dive exploration of the lifecycle of a LiveView so you understand exactly how it works. And we take it a step further by looking at the websocket traffic to see how LiveView delivers optimized UI updates at blazing-fast speeds.
Building this example step-by-step gives us our first look at a LiveView that reacts to form change events, and again we look at what's on the wire. Later on in the course we build more sophisticated forms, but this simple dynamic form is an ideal starting point. (Live Demo)
LiveViews are stateful Elixir processes. That's a total game-changer! Not only can LiveViews react to user interactions at remarkable speed and scale, they can also dynamically update UIs when state changes on the server. As an example of handling internal messages, we create a dashboard of stats that change on a periodic interval. (Live Demo)
Want to search and get the results without a full page reload? LiveView makes that snappy! It's so responsive you almost don't need a loading state, but we add it for completeness. We also look at how LiveView optimizes data over-the-wire when rendering lists. It's crazy smart. (Live Demo)
How would you build a LiveView that filters data stored in your Ecto repo based on dynamically changing filter criteria? The user ticks a box or changes an option and boom! the page updates with results. We show you exactly how to build it, and you can adapt it for your own data! (Live Demo)
Almost every application needs some pagination, so this is another example you can swipe and easily adapt to work with your own tabular data. Navigating between pages of Ecto results is zippy thanks to live navigation, and we make sure the URL is always updated so pages can be bookmarked. (Live Demo)
No page of tabular data is complete without links for sorting each column. And of course you also want the sorting options to be preserved in the URL so bookmarked pages show consistent results. No worries, this example has you covered! (Live Demo)
Here's another common one: pop some data in a form, submit it to create a record in the database, and dynamically add the new thing to a list. LiveView has efficient ways to append and prepend elements to a list without replacing the existing contents. As a bonus, we also tweak it to be memory-efficient. (Live Demo)
How do you validate form data on the fly? By combining Ecto changesets with the real-time performance of LiveView, we can use all the server-side validations to give instant feedback to the user. It's one unified code base, so there's no need for separate client-side validations. (Live Demo)
On or off? Pending or completed? Draft or published? Your UI often needs a quick and easy way to toggle a bit of state. We'll show you how to do it the LiveView way. (Live Demo)
You don't have to jump through a bunch of hoops to update LiveViews in real-time across browser sessions. Phoenix PubSub makes it super easy to broadcast messages from the server to multiple LiveViews. In this example, we use PubSub to keep everything in sync! (Live Demo)
If you've used something like React or Vue, then you're familiar with splitting your UI into reusable, easy-to-maintain components. No surprise, you can do the same thing with LiveView! LiveComponents come in two flavors: stateless and stateful. We build one of each and explore how they're different, when and why to use them, and communicating between components. (Live Demo)
Components, components, components! Once you know how to make them, you'll find lots of opportunities to restructure LiveViews into components. We extract three reusable components from an existing LiveView to improve the overall design.
If you've done any browser-based testing, then you're in for a real treat testing LiveViews! No configuration necessary. No headless browser gumming up the works. LiveView has first-class testing support so you can write high-confidence tests that run orders of magnitude faster than using a bulky browser. We write tests for 8 different LiveViews, focusing on tests that teach us something new, so you come away knowing how to test any LiveView.
How does authentication work when it comes to LiveView and websocket connections? For starters, you need a secure session-based authentication system that has all the standard features: register, log in, log out, and so on. Building all this from scratch is a fool's errand. The go-to authentication library for Phoenix and LiveView is phx.gen.auth. We walk through all the relevant code so we can confidently use it to authenticate LiveViews. (Live Demo)
With a good grasp of how phx.gen.auth works, we're ready to use it to ensure that only authenticated users can access a LiveView. Doing that takes very little code, but the story unfolds with a bit of a twist: How does a LiveView access session data in both the disconnected and connected states? We'll show you how to do it seamlessly and efficiently. (Live Demo)
Suppose you want your user registration page to be a LiveView so the user gets real-time validations. Just one problem: a session cookie needs to be set to automatically log the user in and LiveViews can't set session cookies over a websocket connection. LiveView has a solution: you can validate the form in the LiveView and trigger a Phoenix controller action for handling the form. It's a handy pro-level technique you won't want to miss! (Live Demo)
Who doesn't like a real-time chart or graph? As another example of JS interop, in this example we use Chart.js with a LiveView to display a time-series chart that automatically updates on a periodic interval. The technique is the same regardless of which JS charting library you prefer. Snag this example and you're off to the races! (Live Demo)
Interactive maps are commonplace in today's web apps. And hooking a map into a LiveView with two-way, real-time interaction isn't just cool—it lets us explore more advanced JS interop. We push events back and forth between the LiveView and JS for a seamless experience. Given what you learn in this example, you can use pretty much any JS library with LiveView! (Live Demo)
LiveView has first-rate support for key events, too. Take your app's interactivity up a notch by triggering LiveView events for specific key presses to support navigation, shortcuts, hot keys, and more!
Building a custom modal component from scratch is a capstone example that pulls together a bunch of techniques: components, live navigation, key events, click events, and so on. With this example in hand, you'll be well on your way to designing your own reusable components following LiveView best practices.
How do LiveViews interact with other stateful processes in your application? In this example, we kick background jobs to a GenServer process and design a LiveView that gets real-time progress updates. We leave behind the complexity of polling and pick up a general technique for using LiveViews in the large.
“This is an awesome course! I really appreciate the way you build up the knowledge bit by bit. I'm already feeling confident to go out and use LiveView in my own projects.”
What You'll Get
Stream online or download. English subtitles. No rambling or fumbling. Straight to the point and perfectly paced.
See the entire lifecycle and how everything works. Get a solid mental image of the programming model.
Get deliberate and directed practice by applying what you learned to build different examples. Solutions included.
Full source code for all the examples, with Git branches for the beginning and ending code.
A handy PDF summarizing the techniques covered in the course for quick reference.
No monthly subscription. No time limit. Start today, work at your own pace, and revisit as often as you like.
Start the course today and find out how LiveView brings the heat without any of the burn!
“It's been a very long time since I’ve had this much fun learning something. The explanations are SUPER clear and easy to remember. It's all very impressive!”
For Experienced Developers
To keep this course focused and paced just right, we assume you're already familiar with Elixir and Phoenix.
If you're new to Elixir, our Elixir and OTP course is the most approachable introduction out there. Start here to get the clarity and confidence to jump right into LiveView.
If you've been around the block with Elixir and Phoenix, discover how Absinthe makes building a GraphQL API a breeze for Elixir developers in our Full-Stack GraphQL course.
Created with 💛 by
Mike and Nicole Clark
After building a dozen or so of these features, we realized they wouldn't all make sense in the application we created for the Phoenix course. Alas, some of the LiveView examples would end up on the cutting room floor. 😓 But then we thought, "Hey, we could turn this into a fun and practical mini-course!" So that's exactly what we're doing. We hope you enjoy it. 😀
With Help From
An Awesome Tech Reviewer
José Valim is the creator of the Elixir programming language, co-creator of Phoenix LiveView, and Chief Adoption Officer at Dashbit.
We're super thankful for José's support of this project. His review of early drafts of our animations was instrumental in helping highlight and clarify what's unique about LiveView. Thanks, José!
💥 This Course Is A Hit! 💥
“If you want to learn more why Phoenix LiveView is such a game changer for writing interactive and real-time applications, the @pragmaticstudio folks put together a short and sweet 4-min video on it.” José Valim, co-creator of Phoenix LiveView
“Top notch care given to the details and explaining how the magic happens. Thanks to @clarkware and Nicole for stitching this together.” Yeong Sheng
“The best way to learn what Phoenix LiveView can do is to see it in action, like on this free course from @pragmaticstudio.” Marko Honkanen
“This is the best online course experience I've ever had. The examples are VERY helpful and I love the challenges after the video too.” Lauren Fackler
“Holy moly! You have the best walkthroughs, explanations and tips from any videos I've seen about this beautiful piece of technology. It's an invaluable resource!” Clemens Müller
“It's been a very long time since I’ve had this much fun learning something. The explanations are SUPER clear and easy to remember. It's all very impressive!” Felix Borzik
“I love the clarity of the explanations and how well they explain what happens under the hood. Also like the real-life examples. I already had some experience with Liveview but not the time to dive into how it works behind the scene. Very interesting!” Thomas Galibert
“This is one of the best online programming courses I've ever taken! All the examples where super useful and very well explained. The notes and exercises helped me nail the theory, gain hands-on experience, and understand the topic better. Thank you very much for this amazing course!” Nikita Savitskiy
“This is by far the best course I've ever watched! Each section is easy to digest and comprehend.” Bert Cammayo
“Your courses are really top notch! The LiveView examples are excellent real-world examples of interactive items you would find on a web application.” Tony Hanusiak
“The balance between theory and practice is spot on, and the use cases are very helpful. I also really enjoyed the part where you dig into the diffs for each socket message and how that builds the DOM. Great work!” Toni
“I like that each video is short and covers one feature to implement. I give it max + 1 stars!” Michael Chavez
“I've enjoyed getting a more practical grasp of LiveView together with an understanding of the way it works. Thanks!” Jukka Välimaa
“You have a very special way of slicing any elephant into digestible lumps, and adding tasty sides! Thanks a bunch!” Walther Diechmann
“Really fantastic course! I'm enjoying the "real-life" components rather than just another counter example. The explanations are very in-depth and I feel like I am getting a greater understanding of LiveView.” Aidan Barrett
“I really like the great explanations of the overall programming model, what's happening on the wire, and how to debug that. The videos and exercises are well balanced!” Callum McIntyre
“This is an awesome course! I really appreciate the way you build up the knowledge bit by bit. I'm already feeling confident to go out and use LiveView in my own projects.” Jaime Iniesta
“This course is fantastic! It has helped me understand LiveView so much better. I love how you not only show us how to do the LiveView stuff but also explain the mechanisms behind it.” Julien Crevits
“The graphical explanation is awesome!! It helped me better understand all the heavy lifting Live View does for us.” Joaquin Alcerro
“This is great tech, so good of @pragmaticstudio to release the early access course. That's going to lead to some amazing things being built!” Peck
“I finished all 8 sections of @pragmaticstudio’s free(!) Phoenix LiveView course released so far. I couldn’t recommend it more highly. If you haven’t learned Elixir, I also highly recommend their Developing with Elixir/OTP course.” Daryl Spitzer
“This course is very clear! I like that in the notes that accompany the video there are some very useful tips and small projects where I get to test the skills I just learned in the video.” Fredrik Gustafsson
“I really enjoyed the LiveView life cycle video. Your explanations are fantastic as usual!” Juan Cervera
“The graphics and animations are excellent! Your explanations very much aid my understanding. It’s very engaging too.” Napoleon Ahiable
“I just watched the first few videos and your explanation of how mount is called twice, and how it sends the diff down the wire—perfect!” David Alm
“I really like the structure of this course (the git repo, course outline, and notes after each step). The pacing and flow have been just right for my Elixir knowledge. And the video length is just right for my tea breaks from my day job. ;)” Jon Hancock
“I've been writing Elixir for a few years and had a hard time wrapping my mind around the LiveView programming model. Your course gave me the know-how and confidence to get a couple of LiveViews configured and running in our production Phoenix app!” Matthew Lehner
“As an introduction to LiveView this course is super cool! 👍🏻 It's a very nice explanation of the fundamentals.” Jiří Erhart
“This course is great! The content is clearly delivered and presented as just complex enough to teach the concepts without overwhelming me during the learning process. No time wasted at any point.” Mark Berry
“You folks are wizards! Over the past year or so, I became quite interested in Phoenix LiveView and really want to learn it well. Your course has been very illuminating, helpful, and refreshing!” Mark Johnson
“Just watched the first batch of @pragmaticstudio @elixirphoenix LiveView videos, and they're amazing!” James Lavin