What is a Builder?

• Init a builder data structure with a set of reasonable defaults
• Customize those defaults through a series of chained function calls
• Builders have the same type for the return type and final argument, so that they work nicely in a pipeline

Resources and Examples

• Luke Westby's http-builder package
• Brian Hicks' Robot Buttons from Mars talk
• elm-review package docs
• elm-pages/phantom builder live coding
• Richard Feldman's Oslo Elm Days keynote