elm - never get a runtime error anymore. almost
Post on 12-Apr-2017
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ElmNever get a runtime error anymore. Almost.
Montage
Secret techniques for reliable projects
• Use pure functions• Avoid nulls• Immutability everywhere• Powerful type system• One global state• View is just a pure function of state
Elm
Has Haskell-like syntax, but thankfully it’s not Haskell
Elm• Pure language• No nulls• Everything is immutable• Compiler checks everything• Very opinionated
Elm Architecture
View
function
Model
data
Update
Action
function
EventHandlerevent
event
Elm Architecture is a fractal
EventHandlerevent
event
Model
UpdateView
Model
UpdateView
Model
UpdateView
ModelUpdate
View
Action
No, not really…
Cons• Very opinionated• Tooling• Dead Code Elimination• Immaturity• Runtime errors are still possible• Some things are hard to do• Almost no libraries for “production”• Poor coverage of modern browser APIs
Is it ready for production?It depends…
But if you learn it,it will make you a better JavaScript developer.
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