How to get away with functional programming in frontend applications

on YouTube ↗43m

" summary

Argues that injecting functional programming into an existing JavaScript app is practical: set up TypeScript alongside Babel or replace the transpiler, add declaration files from DefinitelyTyped, and write new files in TS while leaving legacy JS. Recommends replacing Promise with fp-ts Task and using Option for nullable values. Gives a real case: a ~50k lines in 3 months migration to TypeScript by a small team while shipping features, demonstrating the approach works.

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" chapters (10)

1. 0:00Introduction
2. 1:40Functional programming
3. 11:50Complexity
4. 17:16Fungal War
5. 24:53Type Checkers
6. 25:20JavaScript Type Checkers
7. 29:05How to migrate to TypeScript
8. 35:43Can these be done
9. 36:44What about functional programming
10. 39:51Task

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