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NOTE: I've updated the first 4 weeks of text to 0.18 so far (it was released on November 14th). I'll keep updating the text at a fairly quick pace, and the videos will begin updating pretty soon as well. More frequent progress updates here.

Meet your expert

Josh Adams

I've been building web-based software for businesses for over 18 years. In the last four years I realized that functional programming was in fact amazing, and have been pretty eager since then to help people build software better.

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The Elm Programming Language

A brief introduction to the Elm programming language and links to ...

Introduction and Installing

Installation and a brief syntax introduction.

Elm Packages

An overview of the Elm package tool, ecosystem, and some related s...

Our First HTML Application

Building a basic counter HTML application, using `Html.beginnerPro...

Elm Weekly Drip #1 and Exercise: Counter Extended

Links getting a bit further introduced to the Elm ecosystem, and a...

Understanding beginnerProgram and Building Todo

A solution to Elm 001.5's exercise, and readings to prepare you fo...

TodoMVC Planning

Preparing to implement TodoMVC by modeling the problem domain.

TodoMVC Part 1: Model and Views

Beginning our TodoMVC implementation in a new project, with the mo...

TodoMVC Part 2: Adding Todos

Adding the ability to add Todos to the model in our TodoMVC implem...

Elm Weekly Drip #2 and Exercise: TodoMVC - Adding Todo Details

A few more links to explore, and an exercise: Modifying the TodoMV...

Extending Todo and Filtering

Solving the previous TodoMVC exercise, and planning for editing an...

TodoMVC Part 3: Marking Todos Completed

Adding an identifier to each Todo, and wiring up the checkbox to t...

TodoMVC Part 4: Fixing Identifier Bug

Fixing a bug introduced in the previous drip.

TodoMVC Part 5: Filtering

Filtering Todos by their completion state.

TodoMVC Part 6: Removing Todos

Removing Todos from the list.

Elm Weekly Drip #3 and Exercise: Clearing Completed Todos

Links from around the internet, and an exercise suggestion: cleari...

Cmd, Tasks, and Ports

An implementation of the previous exercise, as well as introductor...

Tasks and Cmd with RandomGif

Implementing the RandomGif example from the elm-architecture-tutor...


Interop between JavaScript and Elm uses Ports. In this episode, w...

Outbound Ports

Sending data from Elm to JavaScript by way of ports.

Elm Weekly Drip #4 and Exercise: Ports, Outbound and Inbound

The week's links, and an exercise to implement both inbound and ou...

LocalStorage in TodoMVC

Preparation for the week and the solution to the Ports exercise. ...

LocalStorage via Ports

Storing the state of our model in the browser's LocalStorage by us...

LocalStorage and JSON

Storing a slightly more complicated model into LocalStorage, and e...

TodoMVC Part 7: LocalStorage

Implementing custom JSON encoders and Decoders in order to store o...

Why map4?

Introducing `elm-decode-pipeline` for a better way to decode JSON.

Elm Weekly Drip #5 and Exercise: External APIs and JSON

Quite a few links around the Elm ecosystem, and an exercise to bui...


This week we'll take a break from HTML and start exploring Elm's G...

Graphics Introduction

Learning about the Graphics capabilities that Elm provides, as wel...

Graphics Shapes

Reviewing various other shapes at your disposal from the `Collage`...


Building an application that allows the user to place stamps on a ...

Extending Stamps

Adding the ability to stamp multiple shapes.

Adding More Messages to Stamps

An exercise to add a message to the Stamps application

Elm Weekly Drip #6

Just a few high quality links this week, with a heavy focus on con...

Graphics Input and Etch-A-Sketch

This week we'll implement an Etch-A-Sketch, introducing various me...


Exploring more of Elm's Graphics capabilities by building an Etch-...

Repeating Keypresses

Introducing `Time.every` and `Keyboard.Extra` to allow us to intro...

Graphics Input and Animation

Introducing Graphics.Input to add a Shake button to our Etch-A-Ske...

Multiple Animations

Handling multiple sequential animations in our Etch-A-Sketch.

Graphics Input: Picking Colors

An exercise adding color-changing functionality to the Etch-A-Sketch.

Elm Weekly Drip #7

Structuring larger Elm apps, creating web components that use Elm ...

Project Setup and Tooling

This week we'll look at setting up our Projects a bit more intelli...

Project Setup

Defining a reasonable project structure, adding a good README, add...


Using `elm-format` to make your code pretty.


Debugging in Elm with `Debug.crash` and `Debug.log`.


Using `elm-test` to write tests for your applications and run them...

Elm Weekly Drip #8

This week: an awesome elm sound toy; nesting components; Elm and E...

Date and Maybe

This week we'll look at the Date and Maybe modules in the Elm stan...


Dealing with Dates and Times in Elm.


Using `elm-date-extra` to provide some much-needed Date functional...


Handling computations that aren't guaranteed to have a meaningful ...


Looking at the use of Backwards and Forwards Function Application.

Maybe Dates

This week we learned how to deal with Dates and how Maybe worked. ...

Elm Weekly Drip #9

This week: Accidentally Concurrent, Fractal UI Patterns, Ray Traci...

Web Audio

This week we're going to talk about the Web Audio API. There's a ...

Building a Theremin with Web Audio

Building a Web Audio-powered Theremin, controlled by the mouse pos...

Web Audio Analyzer / Elm Interop

Gathering fast Fourier transform data from web audio, and sending ...

An Oscilloscope Appears!

Graphing our Audio Graph's data in Elm as an oscilloscope, centere...

Alpha Oscilloscope History

Making our oscilloscope look slightly more retro by adding traces ...

Reduce CPU Usage for Oscilloscope

For this week's exercise, we'll essentially manually memoize some ...

Phoenix and Elm

A solution to reducing elm_theremin's CPU usage re: the alpha osci...


Building an Elm client to an Elixir Phoenix-based chat application...

Refactoring the Chat Client

We refactor the views for the chat client to make it easier to fol...

Adding Presence Support to elm-phoenix-socket

Contributing to our first library, by adding Phoenix.Presence supp...

Elm Weekly Drip #11 and Exercise: Support PresenceDiff Types

Some articles on Elm Types; convincing your co-workers to give it ...

Phoenix and Elm, Continued

A JSON Decoder for `PresenceDiff`, and preparation for implementin...

Phoenix syncState in Elm

Test-Driving our Phoenix Presence client by porting the existing p...

Phoenix syncDiff Implementation

Porting more of the `presence_test.js` test suite and implementing...

Using Presence

Making use of our Phoenix.Presence support in elm-phoenix-socket i...

Elm Weekly Drip #12 and Exercise: Enhance elm-phoenix-socket

We cover why walking's great but the existence of legs doesn't mag...

Extracting Modules, Nested Records, and Parameterized Types

This week we'll extract a `Presence` module and continue creating ...

Extracting Presence Module

Extracting a Presence module for the `elm-phoenix-socket` library ...


We implement `Presence.list` in `elm-phoenix-socket`, and in the p...

Nested Records and Phoenix.Presence

Making the Presence support in `elm-phoenix-socket` more friendly ...

Elm Weekly Drip #13 and Exercise: Use Presence Metadata in Elm Phoenix Example

Strap in, we've got another substantial list of Elm-related (and o...

Single Page Apps

Preparing for a new project where we'll build a Single Page App, a...

Content Catalog, Part 1: Initial Setup

Tiny submodules and introducing Navigation.

Content Catalog, Part 2: Link Helpers

Building out links for our navigation elements, using types to mak...

Content Catalog, Part 3: Topics and Content

Nested Routes, and some more modularity.

Elm Weekly Drip #14 and Exercise: Marking Active Routes

This week: we'll cover more Phoenix and Elm; see another Elm game;...


Styling in Elm with `elm-css`, as well as the exercise solution fr...


A CSS preprocessor for Elm.

Structuring elm-css

Breaking out the CSS into its own file and introducing variables a...

Generating CSS Files with elm-css

Producing CSS files for use externally.

Elm Weekly Drip #15 and Exercise: Go Crazy With Styling

Build some GIFs (pronounced "jiff"); Learn from Philip Wadler; Sto...

Component Communication

Exploring various component communication patterns, and an exercis...

Componentizing Chat

Parent <-> Child communication by way of building the beginnings o...

Componentizing Chat, Part 2

Introducing our own `OutMsg` type to send messages to the parent f...


A package to reduce boilerplate when using the `OutMsg`, `Maybe Ou...

Elm Weekly Drip #16 and Exercise: Translator Pattern

A smattering of interesting links in Elm-land, and implementing Tr...

Dictionaries of Components and Phoenix Control Channels

Examining a dictionary of child components, and testing the Transl...

Dictionaries of Components

A pattern for managing dynamic stateful components in your applica...

Recursive Update

A discussion around alternatives to recursive `updates`.

Phoenix Control Channels

Adding RPC-style calls from our server to a given user's client.

Elm Weekly Drip #17 and Exercise: Add Chat Notifications and Channel Switching

Another juicy linkdump, and an exercise to further flesh out our c...

Elm Material Design Lite

The solution to last week's exercise, and some prep reading for an...

elm-mdl Introduction

An introduction to using Google's Material Design language in Elm,...

elm-mdl: Textfields and Menus

A super brief introduction to text fields and menus in elm-mdl. W...

elm-mdl Lists and Cards

Using elm-mdl Lists and Cards to make our chat application a bit n...

Elm Weekly Drip #18 and Exercise: Use More elm-mdl

An exercise to use more elm-mdl. Also: drive a browser with Elm; ...

More elm-mdl exploration

Using Material.Textfield, fixing up our header, adding badges and ...

elm-mdl Grid and Tables

A brief overview of elm-mdl's Grid and Table components, as well a...

elm-mdl Snackbar and Toast

Adding Snackbars and Toasts to our chat app, for transient user no...

elm-mdl Tabs and Dialogs

A look at introducing Tabs and Dialogs to our chat application.

Elm Weekly Drip #19 and Exercise: Webpack Hot Module Replacement

An exercise to add webpack hot module reloading; also: bugs, matri...

Time Tracker Single Page App

Preparing for work on a full-featured Single Page App, and reviewi...

Basic CRUD in a Single Page Application

An initial pass at interacting with our backend API from an Elm SPA.

Cleaned Up CRUD

Extracting an API module, deleting and viewing users, and dealing ...

Finishing a CRUD Resource with a Sortable Table in elm-mdl

Making our users list use a Material.Table and adding the ability ...

Elm Weekly Drip #20 and Exercise: Edit Users

An exercise to add an edit form. Also: what to do, humor, loops, ...

Editing Users and a Week of Refactoring

Preparing to refactor our Single Page App and last week's exercise...

A Grab Bag of Refactoring and Tweaks

Introducing View Helpers for per-route custom headers, and making ...

Refactor API

Refactoring our API to be nicer to deal with and extend.

Refactor Update and Msg

Refactoring our Update and Msg to improve maintainability, without...

Elm Weekly Drip #21 and Exercise: Add resource - organizations

Time for some elm links! Also, an exercise to add a new CRUD reso...

More Single Page App Fun

Adding another resource to our single page app (and seeing how it'...

Validation and Error Messages

Capturing and decoding API Errors, showing them in the Snackbar, a...

Integrating elm-simple-form with elm-mdl Inputs

A couple of great libraries that taste great together.

Server-Side Validations (Josh Adams and Luke Westby pairing)

Making server-side validations play nicely with elm-mdl and elm-si...

Elm Weekly Drip #22 and Exercise: Use Validations on Remaining Resources

The Glorious Day of Links!

Authentication and More UI Niceties

Validating our other resources and some refactoring, and preparing...

Authentication and APIs

Interacting with a remote API that requires authentication, along ...

Cards for Users

Flip between Table and Card views for our users resource.


Building a Project's Tasks as a Tree structure and rendering it us...

Elm Weekly Drip #23 and Exercise: Remember Auth Token

Links on SVG, TDD, designer-love, and easy elm app bootstrapping. ...

Yet more Single Page App!

A solution for storing and reloading an API Key, and preparation f...

Activity Graph

Building a widget that looks strikingly similar to the GitHub Cont...

Handling Expiring API Keys

Being forced to log in for ever hot module replacement is unaccept...


Using wuct/elm-charts to render a line chart over some data.

Elm Weekly Drip #24 and Exercise: App-Wide 401

Links on elm-conf, interesting projects, and some blog posts (so m...

Integrating Leaflet.js

Preparing to integrate Leaflet in an Elm app, and solving API-wide...

Interacting with Leaflet for Maps

An example of integrating from Elm with a large UI-based JavaScrip...

Responding to Leaflet Interactions

Handling events on the Leaflet JavaScript side and reflecting them...

Adding Markers to Leaflet

Extending our existing Leaflet.js integration by adding the abilit...

Elm Weekly Drip #25 and Exercise: Extend Leaflet Interactions with Markers

An exercise to extend Leaflet.js, and: parsing in Elm; an online R...

Preparing for SPA Tables with Pagination and Search

Solving last week's Leaflet exercise, and preparing to paginate ou...

Parsing RFC 5988 for API Pagination

Using elm-combine to parse a draft RFC that adds support for links...

Paginating Tables in Elm

Adding pagination to our tables using the Link header we learned t...

Finishing Table Pagination

Completing our work on paginated data tables.

Elm Weekly Drip #26 and Exercise: Build a Generalizable Paginating Table View

Links on: Thinking Computationally; Fancier SVG Graphics; immutabi...

Remote Data and Search

Preparing to introduce loading indicators and search, and solving ...

Using RemoteData for Better UX

Leveraging the type system to ensure we don't overlook parts of th...

Smoother Loading of RemoteData

Extending our RemoteData types to allow us to show a loading display.

Searching in our Tables

Quickly adding the ability to search to our data tables.

Elm Weekly Drip #27 and Exercise: Loading and Search Everywhere

Links covering: Geocoding, Web Components, Lenses and Prisms and I...

Server-Side Sorting and Better Charts

Planning for server-side sorting and better charting, and solving ...

Server-Side Sorting

Adding the ability to specify the sort order we prefer from the ba...

Generalizing Server-Side Sorting

Implementing server-side sorting throughout the rest of our resources.

Better Charts with elm-visualization

A package for charting that's inspired by D3's data model.

Elm Weekly Drip #28 and Exercise: Extend Charts

Links covering: REST and GraphQL; Plotting; Genetic Algorithms; Mo...

Preparing for Resource Details

Preparations for resource detail views, and solving an exercise to...

Making the Users Show View Nicer

Adding a much more full-featured resource show view.

More Detailed Users Show View

Adding tab interactions, multiple tabs, and implementing a view of...

Adding an ActivityFeed View

Implementing a view that shows user activity as a timeline.

Elm Weekly Drip #29 and Exercise: Add Projects Tab

Links covering: Elm 0.18 released, and upgrading made easy; type b...

Preparing for Web Components

Preparing to introduce web components, and an exercise to add a ne...

Web Components Introduction

A quick primer on using Web Components with Elm

Polymer App Layout

A substantial and deep dive into building out a Material-style lay...

Paper Cards, Menus, and Floating Action Buttons

An introduction to a few more intriguing Paper components.

Elm Drip 030.5: Elm Weekly Drip #30 and Exercise: Credit Card Form

An exercise to build a credit card form with Web Components, and l...

Styling and Releasing an Elm + Web Components App

Preparing to style our app and release it, and an exercise to crea...

Using elm-polymer and Styling Our App

A library to make using Polymer a bit nicer, and a look at how to ...

Responding to Events from Polymer Components

Hooking into Polymer events to drive our app's messages.

Building a Release

Adding vulcanize-loader into the mix and building a minified release.

Elm Weekly Drip #31 and Exercise: Close Drawer on Click

An exercise to improve the user experience in our Elm+Polymer app,...

Signup and Pay with Stripe

Building a signup flow for a subscription site, and interacting wi...

Accepting Credit Cards with Stripe

Integrating with Stripe.js via Ports.

Stripe Subscriptions and Your Backend

Sending a token to the backend to complete a Stripe subscription, ...

Users and Subscriptions

A sign up flow for an Elm app that requires a paid subscription, p...

Elm Weekly Drip #32 and Exercise: No Layout Until Login

An exercise, and links ranging from Technical Debt to Haskell to P...

FileReader and S3 Direct Uploads

Using the FileReader API from Elm with a Native package, and manag...

Introducing FileReader

Using a Native package to read file inputs and extract image previ...

Requesting S3 Upload Capability from the Backend

Talking to a new API endpoint to request and store permission to u...

Uploading Directly to S3

Using a backend-provided capability to upload directly to S3 from ...

Elm Weekly Drip #33 and Exercise: Multiple Uploads

Links covering plotting, tacos, editor features, ember+elm, and op...

Preparing to Build a Drawing Tool

Building a moderately complex SVG-based drawing tool with support ...

Adding and Editing SVG Shapes

Building the foundation for an Interactive SVG Editor in Elm.

Selecting Shapes

Adding an interface to select shapes in our SVG editor.

Adding Shape Tools

Adding sidebar tools and tracking our mouse's SVG coordinates to a...

Elm Weekly Drip #34 and Exercise: Moving Shapes

Adding a move operation to our SVG editor, and reviewing what's be...

SVG Editor Week 2

Solving the exercise to move shapes around, via SVG drag and drop.

Editing Shapes Interactively

Adding resize handles to change the size of our shapes interactively.

SVG Editor Cleanup

Fixing some usability issues and extracting our update function.

Reordering Shapes

Adding the ability to change the order in which our shapes are lay...

Elm Weekly Drip #35 and Exercise: Add Text

An exercise to expand our SVG editor with text nodes, as well as l...

SVG Editor Week 3

Adding text shapes and preparing for further shape editing and fir...

Editing SVG Properties

Adding a form to modify the properties of our SVG shapes, using th...

Firebase Setup

Getting the basics of Firebase support in place.

Synchronizing Our SVG Editor with Firebase

Using Firebase to synchronize our Elm model, providing persistence...

Elm Weekly Drip #36 and Exercise: Remedy Firebase Synchronization

3D Geometry, Production Success Stories, View Maturity Upgrades, a...

Firebase Authentication and Storage

Solving our overzealous persistence issue and preparing to integra...

Firebase Authentication

Integrating with Firebase to support signing in with multiple prov...

Firebase Storage

Using Firebase Storage from Elm to store uploaded images.

SVG Editor Images

Adding the UI elements necessary to support uploading images to Fi...

Elm Weekly Drip #37 and Exercise: Add Image Shapes

VR, Web-based Elm Editing, and a host of node-related Elm tools. A...

Solution for Adding Image Shapes

Adding support for SVG Image nodes to our editor, and preparing to...

Introducing elm-ffi

A package for prototyping Elm and JavaScript interop.

elm-ffi Safety and Async

Exploring more of elm-ffi's features - safety and asynchronous fun...


An elm package that makes it easy to add context menus to your app...

Elm Weekly Drip #38 and Exercise: More Contextmenu

A week of links and an exercise to expand on our context menu

Elm Native UI Prep

Preparing to build a mobile native app using elm-native-ui, and so...

Building Native Mobile Apps with Elm

Elm and React Native in Holy Matrimony, via elm-native.

Exploring Elm Native UI Further

Looking into some elm-native-ui apps' code and talking through it ...