Scala.js: Safety and Sanity in the Wild West of Web development

on YouTube ↗56m

" summary

Scala.js compiles full Scala to JavaScript, produces a 95 KB optimized bundle from a ~550 KB fast build, and runs about as fast as raw JS. Demos show a Sierpinski canvas, a typed DOM autocomplete using ScalaTags, hygienic CSS that generates unique class names, and a client/server file browser that uses upickle and a shared API trait with compile-time checks so AJAX returns typed Scala values. Compilation warms up to ~1s; community totals ~1M LOC with a few 10–20k LOC projects in production.

AI-written summary · about

" chapters (10)

1. 0:00Introduction to ScalaJS
2. 0:25What is ScalaJS?
3. 2:32Live coding: Project setup
4. 9:06Building UI with ScalaJS
5. 14:20Interactive web development
6. 20:14Comparing frontend technologies
7. 25:55Type-safe CSS and styling
8. 32:07Ajax and API calls
9. 40:07Client-server synchronization
10. 48:06Q&A and concluding thoughts

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