Beginner's Guide to Elm Programming. Build Web Apps!

Explore Elm basics with the rebel repl: test snippets, learn about types, numbers, floats, strings, and simple arithmetic, plus immutable data and basic type inference.

Explore booleans, true and false, and basic comparisons including not-equal checks in Elm. Learn about lists, enforce same-type elements, use the cons operator, and explore functions like string is empty.

Learn to write functions in Elm with simple declarations, square a number using squarer, and multiply two numbers with multiplier, highlighting type inference and basic string reversal.

Explore partially applying functions in Elm to simplify code, using string addition with a space and a square and add pattern, and learn how to invoke nested functions.

Learn how to invoke functions within other functions in Elm, use the pipe operator for partial application, and compose simple examples with numbers and strings to build web apps.

Explore the pipe operator in Elm by comparing a non-pipe approach with a readable, pipe-driven version that sorts a list of names and joins them into a comma-separated string.

Master if expressions in Elm by ensuring every if has an else and all branches return the same type, using a comparison operator and else if for clarity.

Explore Elm tuples, a fixed-size collection of values with potentially different types, and learn how they enable returning multiple values from functions while remaining immutable.

Explore Elm records as flexible key-value structures, access fields with dot notation, and update records immutably using the pipe operator to create new versions.

Learn how records with key-value pairs and mixed types enable structured data, then use a type alias as a constructor to enforce a fixed format for user records.

Explore pattern matching on records in Elm to extract needed fields, like user id, and branch logic with compile-time guarantees, avoiding missing fields and the this keyword, unlike JavaScript objects.

Learn how to write Elm files, declare a module, and use the Html package to render text, then compile to Html or JavaScript and embed into the DOM.

Explore building Elm web apps by creating an Elm file that exposes HTML elements and renders div, h1, and p tags with text to a dynamic DOM structure.

Import Html.Attributes to add class attributes on elements and render them in HTML, while using explicit type annotations and the --warn flag to catch missing types.

Elm Reactor enables on-the-fly compilation and live reloading on localhost 8000, letting you prototype by editing adjacent files and instantly see changes, dependencies, and compiler errors.

Learn elm syntax by rendering a status checks list into a ul with li items using a render lists function, map, and text to an html message.

Explore the Elm architecture—model, update, and view—and learn how state, events, and the view drive a simple interactive app built with a beginner program, messages, and on click.

Discover how to increase and decrease text size in an Elm app by updating the model and passing size to the style function with buttons.

Learn Elm programming by implementing a size checker to prevent shrinking below one, and adding or removing exclamation marks with a string checker and union types.

Learn to handle user input in Elm by building a simple app with a text input, model, update, and view that renders typed text in real time.

Explore conditional rendering in Elm by adjusting text styles based on input length, using if-else logic without external libraries, and refactoring with a check text size function to reduce repetition.

Apply the dry principle in Elm by extracting a reusable adjust size function that derives text size and color from a model using let, in, and tuple destructuring.

Learn to build a beginner-friendly Elm word guessing game by constructing a simple model, messages, update logic, and view with input and live feedback.

Implement a hint button that reveals letters of the word step by step, updating the model and revealed position to show progress and provide final feedback.

Refactor the Elm model by grouping revealed word and position into a dedicated record, enabling safer reveal and increment logic and cleaner data handling.

Learn how to manage an Elm app's state by replacing an is_correct flag with a result string, and render feedback via a check results function and a submit answer button.

Improve the Elm web app appearance by refactoring styling with a main style function. Center text, use a monospace font, and implement SNOP color logic for tomato or forest green.

Refactor code in Elm by introducing type aliases and records for revealed word and result, replacing brittle string matching with typed data and updating the model to reflect correct results.

Define an initial word list of strings in the Elm model, and implement a button that retrieves a new word, updates the model, and drops used words from the list.

Learn to filter the word list in elm by excluding the word from the model. Use filter with an anonymous function, and list drop, plus piping and list take one.

Explore the Elm HTML program feature by building a simple mouse-click tracker that uses subscriptions to mouse events, updating x and y coordinates in the model.

Learn how to handle keyboard events in Elm by importing the keyboard package, subscribing to key presses, and rendering the pressed key from key code via the character.fromCode function.

Explore how Elm manages effects with commands and subscriptions while building a coin flip app that uses the random library to generate a true or false result.

Improve app appearance by loading heads or tails images with Elm's image function and attributes, and style them with height and width; introduce a random number generator via Elm messages.

Build a simple Elm chat app with WebSocket broadcasting. Manage input and messages in a model, and implement listen and send to update the chat view.

Learn how to build a lightweight socket server with express and express-ws in node, manage a clients list, and broadcast messages to all open connections while handling disconnects safely.

Expand the chat app by prompting for a user name on load with validation, sending it to the server to format messages, and adding a server-side time feature with moment.

Wraps up the beginner's Elm programming course with encouragement to build simple apps, practice hands-on coding, read official docs, and solidify the basics to build web apps.