The magical disappearing UI framework

 - The web's JavaScript bloat crisis, solved. Svelte turns your templates into tiny, framework-less vanilla JavaScript.
 - Simple and familiar. Build apps out of composable, easy-to-write blocks using languages you already know.
 - Super fast, rock solid. Compile-time static analysis ensures the browser does no more work than it needs to.

svelte

Learn Svelte

SvelteKit is an application framework that builds on top of Svelte that provides you the app level functionality you need. It does the boring stuff that you don't want to so you can execute on the projects you want. 

As you build with SvelteKit, you'll find it continues the philosphy of Svelte by adhering to Web Standards and APIs. It builds on top of Web APIs so when you're develop SvelteKit sites you are also learning skills that will transfer to any web-based project

In this course, you will build a modern SvelteKit blog powered by Sanity CMS. You'll start from scratch and build out a site that dynamically generates pages that you create inside Sanity. 

As you build your blog, you will learn how to:

- Style Svelte components with TailwindCSS
- Add error pages to different routes
- Query your CMS in the front end
- Parse and validate your data with Zod and JSDoc
- Deploy both Sanity and your app to the web

Build a Sanity CMS Powered SvelteKit Blog

We are now ready to deploy. We can first deploy our CMS by running the command `npm run deploy`. Make sure you are in that project's terminal when you deploy.

Next we need to set up a github repository for our app. Then we can push our code to the repository.

Finally, we can go to Vercel. Create an account if you do not have one and link it to your github. If you are creating an account you will need to make sure that you give Vercel permission to read your repositories or a selected repository. 

Then in your Vercel dashboard click 'New Project' and choose your newly created project for your SvelteKit blog. 

Add your environment variables (you can copy and paste them)

Then deploy 🎉

After deployment go to the url it provides and now you have a deployed blog. 

To make sure all works as expected go ahead and log in to Sanity. Choose your project. It will be named whatever name you gave it when creating your Sanity project. Then click "Open Sanity Studio".

Now navigate to Posts and click the create new post icon. Go ahead and create a second post. Click "Publish" and then navigate back to your posts page on your blog site and now we have posts uploading to our site as we write them. 

Note: If you are already on the the /posts page on your blog site when you go back to it, you will need to refresh the page.

Deploy Sanity and Sveltekit to Production

TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.

typescript

Up to this point in our app, the only help we are getting from typescript is from SvelteKit's built in types. But these types don't infer our data structure so we need to add types using JSDoc and zod. 

One of the benefits of zod is that it can be used for schema validation in javascript by using the built in parse helper function. You can also infer type definitions from zod schemas using the infer helper. 

We can then use those types that we infer from zod schemas in our JSDoc comments to get type safety where we need. 

If you want a deeper dive into typescript and zod, Matt Pocock has created to great free resources at [Total Typescript](https://www.totaltypescript.com/tutorials)

Parse and Infer Data Being Fetched in SvelteKit with Zod and JSDoc

MDX is an authorable format that lets you seamlessly use JSX in your markdown documents. You can import components, like interactive charts or notifications, and export metadata. This makes writing long-form content with components a blast.



We will combine our knowledge of Dynamic routing to pass a dynamic parameter to a function that will query a single post from our Sanity CMS. When we fetch our blog post data this is a great place to do some processing of the content that we get back. If you didn't process your blog post markdown, it would come back as a string which doesn't look too great on the page.

To make our markdown pretty we will install and use the `MDSvex` library to use it's compile function and render our markdown.
  
We'll see that `MDSvex` gives us a Promise from `compile` because it's an async function so we'll use the Svelte `await` block to conditionally show the post body when it is ready, otherwise we'll show a loading state.

Load a Single SvelteKit Post Dynamically & Render Markdown with MDSvex

We will install the `@sanity/client` package and use the GROQ query language to query all of our posts from our CMS. 

To do this in SvelteKit we need to make a few adjustments to how we load data. We now need a async `load` function that runs on the server because sanity needs to access our environment variables. To do this we'll convert our `+page.js` to `+page.server.js` and make our function `async`.

Query a Sanity CMS from a SvelteKit Blog Frontend with +page.server.js

In this lesson, we use Sanity's Vision feature that provides us with a playground editor to use Sanity's GROQ query language to interact and get specific data from our CMS.

GROQ affords us the ability to query our CMS data in the specific format that we want. 

If you want a deeper dive into the GROQ query language, check out this [free course](https://egghead.io/courses/introduction-to-groq-query-language-6e9c6fc0) on egghead from John Lindquist

Query Sanity Content with GROQ to Return a List of Posts

Instead of writing all of our posts as files in our code editor, we can get the benefit of a CMS to help us store our content. We will use Sanity to write our posts in markdown. Then we can use Sanity's javascript client in our project get our content data from our CMS.

Set Up Sanity CMS to Power a SvelteKit Blog

Dynamic routing is a critical part of most applications. For our blog, we want to have pages load dynamically given a post or article slug. Continuing with our dummy data, we will use the slug to navigate dynamically to a new page and only display information for that singular item from our data.

These dynamic pages include an accompanying `+page.js` file that we can load data from. In this file we will check that the current page slug equals the post from our data store and display that posts data on the page.

Render Dynamic Pages in SvelteKit with Parameter Based Routing

We have some dummy data that we will use to get a grasp on data loading patterns in SvelteKit. Each route gets its on `+page.svelte` but we can also provide a route with a `+page.js` file that allows us to load data and expose it to our page.

You'll learn how this `+page.js` exports a load function that exposes a data object to the page you are loading data to. During this process, we'll use JSDoc to type our page data for some nice types.

Load Data on a SvelteKit Page with +page.js load Function 

Tailwind is a utility-first CSS framework for rapidly building custom user interfaces.

tailwind

We will go through and add tailwind to our project and create a simple navbar. Tailwind is an incredibly easy to learn 'utility-first' css framework. 

Tailwind has a great CLI to help initialize the set up for use so that we don't have to create every config file by hand.

When you run `npx tailwindcss init tailsind.config.cjs -p` you'll have the proper postcss and tailwind config files create. 

We will then add the tailwind base styles to our global css and point tailwind to all the files we want it to process.

From there we'll get some practice in by building out a `<Navbar />` component that will have some basic styles applied.

Add TailwindCSS to a SvelteKit Project and Build a NavBar Component

SvelteKit gives us unique files for adding layouts. Using the `+layout.svelte` file name, we can set layouts for all levels of routes. We can also set `+error.svelte` in each route so that we can handle any errors for these routes. 

We'll do that in this lesson by adding a `<h1>Header</h1>` and `<h4>Footer</h4> ` that wraps a `<slot />` to see it rendered on different pages. Notice that we will need to utilize `<slot />` to render the routes content onto the page as well. This gives us finegrain control of where content goes in our layout.

Add an Error Page and Layouts to SvelteKit Routes 

A route is very simple to create in SvelteKit. Using 'file-based routing' you simply add a .svelte file (posts.svelte) in the routes folder. Then we can navigate to where our app is running. In this case, we go to localhost:4000/posts. 

The index.svelte file can be thought of as the home route which evaluates to localhost:4000. 

We will see more types of routes as we go along. 



Add a Route to a SvelteKit Application

In svelte, you define components in a file. 

This is a special file extension that allows you to add your script, style and template all in one place. You’ll see how a counter component will hold state in Svelte as well as interact and style that component through the different parts of the file.

We'll implement the classic counter example that will show you how to update component state.

You can do a deep dive on Svelte with Tomasz Łakomy’s [Up and running with Svelte 3](https://egghead.io/courses/getting-started-with-svelte-3-05a8541a)

Understand the Structure of a Svelte Component

Web3 is a paradigm shift in how applications are interacted with, ran, and built. 

It’s not just a Pump-and-Dump scheme on cryptocurrencies or Bored Ape NFT profile pictures you can put on Twitter.

A fundamental tenet of Web3 is bringing ownership back to the user. You no longer have to trust that your data is being properly handled on someone else’s server (although, currently Web3 ecosystem mainly depends on centralized infrastructure such as GitHub).  

This ownership is achieved through blockchain, cryptocurrencies, NFTs, and smart contracts.

A great example of this type of ownership is through how you exchange money in Web3. There is no intermediary like Stripe, or PayPal to process your transactions. You can even build your own smart contracts that receive crypto (e.g. Ethereum or ‘eth’ for short) and then process that eth how you’d like.

Building this type of smart contract is exactly what Matías is going to show you how to do right now.

Matías builds out a Web3 application that allows you to receive tips in the form of eth in a tip jar on your website. This means your application will be backed by a smart contract that’s accepts eth, stores data, and emits Solidity events.

The frontend application uses SvelteKit which you’ll see how easy it is to get up and be productive with in minutes. A huge benefit here is that the JavaScript you write is just that, JavaScript. You’ll be able to take what you learn and implement it into any framework of your choosing.

While you build this application you will learn how to:

- Write a smart contract using Solidity language
- Test the smart contract using just JavaScript through the waffle framework
- Communicate and interact with the smart contract using ethers.js in a SvelteKit application
- Deploy your smart contract to make it public and accessible to anyone

Solidity is an object-oriented, high-level language for implementing smart contracts.

solidity

Full Stack Web3 and Blockchain Development on Ethereum with SvelteKit

Now that we have an application that is accepting tips to the smart contract that was defined, we need to be able to withdraw the funds that are sent to the contract. The smart contract function for this is already defined so we will just need to call the function from the front end.

To do this we will create a new route to display the contract information. We will then check if the current user is the contract owner and if so allow that user to withdraw the contract funds by clicking a button that we wire up to call the withdraw function from the smart contract.

## Important

SvelteKit is still in beta. Expect bugs! Read more here, and track progress towards 1.0 here. 

This lesson was recorded before the latest breaking changes, the content is still valid but it sometimes references a file that does not exists anymore.

Now: 
`src/routes/index.svelte` is called `src/routes/+page.svelte`

`src/routes/__layout.svelte` is called `src/routes/+layout.svelte`


Everything else is 100% valid. This particular content will be updated when Sveltekit reaches 1.0.0 stable.

Withdraw eth from a Smart Contract in a Svelte Application

It is time to interact with the contract, let's send some eth!

For this you'll need a form that is rendered only when the wallet is connected.
This form use the `sendTip` function and gather some required information. On submit, it will read the `sendingTip` loading state variable and disable or enable the button.

## Important

SvelteKit is still in beta. Expect bugs! Read more here, and track progress towards 1.0 here. 

This lesson was recorded before the latest breaking changes, the content is still valid but it sometimes references a file that does not exists anymore.

Now: 
`src/routes/index.svelte` is called `src/routes/+page.svelte`

`src/routes/__layout.svelte` is called `src/routes/+layout.svelte`


Everything else is 100% valid. This particular content will be updated when Sveltekit reaches 1.0.0 stable.

Create a Form in Svelte and Send a Tip to an Solidity Smart Contract

We'll start our project by installing all of the necessary tools to get started with Web3 development. 

This project will use SvelteKit Tailwind CSS for it's UI. We have some handy initializers that we will run to do the configuration for us. 

On the Web3 side of things we will use Hardhat, Ethers.js, and hardhat-waffle for smart contract development.

Set up an Ethereum Project using SvelteKit with Tailwind CSS and Hardhat

The first step to starting a SvelteKit projects is initialize the app with commands from SvelteKit's website. 

```bash
npm create svelte@latest my-app
cd my-app
npm install
npm run dev -- --open
```

We'll then test our app is running by adding html to our `src/routes/index.svelte` route.

Create a new SvelteKit project

We will learn how to use the fade transition in svelte to create a simple transition. We will also look at the additional parameters you can pass to this transition to create a staggering effect.

Create a Fade Transition with Svelte

We will learn how to create a component and use the tweened function from the `svelte/motion` package. We will create a function that will work as our looping mechanism and learn how to reduce the chances of our function having a memory leak by using the `onDestroy` lifecycle hook when a component is unmounted.

Create a Looping Tween Motion with Svelte

You will learn how to create a reusable button in Svelte which allows you to update its content, it's look and the action it should perform when clicked.

Create a Reusable Button Component with Svelte

When comparing two visually similar websites, it can often be challenging to precisely identify the subtle differences between them. To facilitate a rapid analysis of these discrepancies, a practical technique involves leveraging Chrome's integrated developer tools to capture full-page screenshots of each site. Subsequently, these screenshots can be uploaded to a platform like AI Studio. There, the AI can analyze the images and generate a report detailing the variations. This entire process, leveraging a few quick shortcuts, can be completed in under a minute, delivering a comprehensive breakdown of the differences for efficient comparison and analysis.

Quickly Compare Two Sites Using AI Studio with Chrome Full Page Screenshots

It's fairly trivial to create a React project, but there's always a big hurdle between creating it locally and making it shareable so that someone else can run it. This lesson walks you through the process of automating creating a React project locally, creating the repository where it's going to be hosted, and creating shareable links where it can be run so that you can quickly and easily create single one-off demos and shoot them over to your friends and coworkers for sharing your code ideas in a working environment.


```bash
share-react-project() {
  if [[ -z "$1" ]]; then
    echo "Usage: share-react-project <project_name>"
    return 1
  fi

  local project_name="$1"
  local github_username=$(gh api /user --jq '.login')

  echo "Creating Vite project: $project_name"
  pnpm create vite "$project_name" --template react

  cd "$project_name"

  echo "Initializing Git repository"
  git init

  echo "Adding all files to Git"
  git add .

  echo "Creating initial commit"
  git commit -m "Initial commit"

  local codesandbox_link="https://codesandbox.io/p/github/${github_username}/${project_name}"

  echo "Adding CodeSandbox link to README.md"
  echo "" >> README.md
  echo "## CodeSandbox" >> README.md
  echo "[![Open in CodeSandbox](https://assets.codesandbox.io/github/button-edit-blue.svg)](${codesandbox_link})" >> README.md

  echo "Adding README.md to Git"
  git add README.md

  echo "Committing README.md changes"
  git commit -m "Add CodeSandbox link"

  echo "Creating GitHub repository: $github_username/$project_name"
  gh repo create "$github_username/$project_name" --public

  echo "Pushing to remote 'origin'"
  git push -u origin main

  echo "Project '$project_name' created successfully!"
  echo "GitHub repository: https://github.com/$github_username/$project_name"
  echo "CodeSandbox link: $codesandbox_link"
}
```

Automate Creating a Local React Project, GitHub Repository, and Live Hosted Demo in a Single Command

[Verdaccio](https://verdaccio.org/) is a fully featured NPM registry that you can run locally on your machine. It’s a great tool for testing your release process, running end-to-end tests, and simulating real-world scenarios like deploying packages, installing them, and verifying functionality as an end user would.

Nx includes a [generator](https://nx.dev/features/generate-code) that simplifies setting up Verdaccio. To configure it, run:

```shell
npx nx g @nx/js:setup-verdaccio   
```

This command installs the necessary NPM packages and creates a `project.json` file with a `local-registry` target. To start the local registry, open a new terminal window and run:

```shell
npx nx local-registry
```

This will:
- Launch the Verdaccio registry.
- Configure NPM to point to the local Verdaccio server at `http://localhost:4873`.

> **Note:** A `project.json` file provides an advanced way to define scripts, offering more flexibility than a traditional `package.json` for managing complex targets.

Setup local Verdaccio server to release NPM packages

Learn how to spin up a local NPM registry powered by Verdaccio to test deploy your NPM packages.

In TypeScript, developers often begin by defining the structure of their data using type definitions or interfaces, which is a powerful way to ensure type safety. However, as applications grow and become more complex, simply defining the shape of an object might not be enough to guarantee its consistent creation and behavior throughout the codebase. This often leads to situations where objects that are intended to be of a certain "type" might be missing crucial properties or have incorrect data, which can be difficult to track down and debug.

This lesson tackles the question of when and why to move beyond basic type definitions and embrace classes in TypeScript. It demonstrates how classes provide a more robust mechanism for defining object structure, enforcing type constraints, and ensuring consistent object creation. By establishing a clear blueprint for objects, classes not only improve compile-time type safety but also offer runtime benefits and better code organization, ultimately helping developers avoid common pitfalls associated with loosely structured objects in larger TypeScript projects.

Stop Avoiding Classes in TypeScript

Karabiner isn't only for your keyboard. It can also hijack your mouse buttons and enable them to be similar to layers on your keyboard, where holding down a mouse button can allow you to tap keys on your keyboard to trigger commands and macros that can completely revolutionize your workflows. For example, you can hold down the right mouse button and tap on R to go to references in VS Code. Or hold down the right mouse button and tap the left mouse button to chop up videos and Screenflow.

This completely unlocks a whole new world of possibilities and use cases for your mouse as you can hover your mouse over anywhere on the page. And just tapping keys on your keyboard allows you to trigger mouse actions, to trigger keyboard actions, or to trigger macros and applications and terminal commands. and anything that your imagination can come up with. 

Karabiner: Rethinking Right-Click as a Macro Command Center

Make an HTML table more readable on mobile devices by using the ::before pseudo-element. We add labels to each cell, so they appear like cards when the table is viewed on smaller screens. The ::before content is set using a data-label attribute for each cell to enhance mobile viewability without horizontal scrolling.



Create a mobile friendly table with the before pseudo-element

Learn to use CSS ::before pseudo-element for mobile-friendly HTML tables. Add labels to cells for enhanced readability on mobile, avoiding horizontal scroll.

Any app of a decent size has event flows and messages being passed around. At a certain point it becomes complicated to explain it through prose and you want to turn towards diagrams. Now setting aside the time to create diagrams that accurately describe what's happening in your codebase can be quite time consuming. Luckily, with today's AI tools, we can now just do basic walkthroughs with rough recordings over codebase dictating what's going on along the way and then upload that to tools like AI Studio and then ask it to generate diagrams in a text-based format such as Mermaid that will then generate the flowcharts and diagrams for us. So this video walks us through this process of recording a rough video, uploading it to AI Studio and then asking AI Studio to generate the proper Mermaid diagram syntax.

Generate Mermaid Flow Chart Diagrams with Gemini 2.0 from Rough Screen Recordings

I'm a diehard Karabiner user and anytime I start doing something repetitively I always move it into my Karabiner configuration. Sometimes I'll fall into scenarios where I want to trigger a command, but I also want to know if that command succeeded or failed. Since Karabiner can trigger any command, setting up the command is fairly straightforward, but knowing whether it succeeded or failed became much more difficult. Luckily for me there is a package called terminal-notifier that you can install from homebrew and you can pipe the output of your command to terminal-notifier. And have a seamless way of triggering your keyboard shortcut which runs a command and you can be notified of the results.

Use Karabiner to Trigger a Terminal Command and Get Notified of the Results

There are a lot of scenarios when inspecting a site in Chrome where you don't want any click events to fire and you don't want any scripts to run. Or maybe something is animating in and out of the page and you want to capture it at a certain moment. This is a great use case for pausing script execution, which is kind of using the debugger manually by going into the Chrome DevTools and the Sources tab and clicking the pause button to essentially pause the entire page. This will give you a chance to inspect any of the elements and styles you want to inspect. And you don't have to worry about fire and click events or anything that might interrupt your investigation into the elements and styles that you want to find.

Pause Script Execution in Chrome to Easily Inspect Elements

Gemini 2.0 has a context window of a million tokens, and this means that you can upload hundreds of files and allow it to inspect and analyze massive refactors across entire code bases. 

This lesson demonstrates concatenating an entire code base into a single file and then uploading it to AI Studio. Once within AI Studio, we ask it to find the types of tasks that it can evaluate for us. Then we select one of the tasks and ask it to generate instructions for that task. Once those instructions are complete, we then turn them over to Windsurf's Cascade agent, and we allow Windsurf's Cascade to do all of the work for us as we sit back, relax, and let the AI do our jobs.