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Make the web functional again. Elm

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What is Elm?

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Functional Reactive Programming Language

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Statically Typed

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Compiles to JavaScript Generates HTML and CSS

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Evan Czaplicki Present: Developed in 2012 by

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Why Elm?

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No more runtime exceptions!

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Pure X ⇒ Y

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Immutable

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Blazing Fast Rendering

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State History (and free time travelling debugger)

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Type inference (but you’ll end up defining your types)

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Interactive Programming Due to Hot Swapping

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Composable Components Like React, but components can run independently

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Amazing Tools!

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REPL Package Manager Compiler Reactor Debugger

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Free and Automatic Semantic Versioning

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Smooth JavaScript interop JS

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Easy(er) syntax and lower learning curve * When compared to other functional languages ** terms and conditions may apply

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Elm Syntax Crash Course

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Literals

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Manipulating Literals

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Lists

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Functions Anonymous functions

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Records

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Type Annotations

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Type Aliases

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Elm Architecture Basic Concepts

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MUV = { Model Update View }

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Signals

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Mailboxes

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DEMO

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Thank You!