Cute lil digger on a under construction sign

New site, mind the dust! Please log any issues or suggestions


February 15th, 2021 × #TypeScript#Compilers#Bundlers

Hasty Treat - TypeScript Compilers and Build Tools

Scott and Wes discuss the difference between TypeScript compilers like TSC and SWC versus bundlers like Webpack, and whether you still need bundlers when using TypeScript.


In this Hasty Treat, Scott and Wes talk about the differences between compilers and build tools in TypeScript.

Sanity - Sponsor is a real-time headless CMS with a fully customizable Content Studio built in React. Get a Sanity powered site up and running in minutes at Get an awesome supercharged free developer plan on

Sentry - Sponsor

If you want to know what’s happening with your code, track errors and monitor performance with Sentry. Sentry’s Application Monitoring platform helps developers see performance issues, fix errors faster, and optimize their code health. Cut your time on error resolution from hours to minutes. It works with any language and integrates with dozens of other services. Syntax listeners new to Sentry can get two months for free by visiting and using the coupon code TASTYTREAT during sign up.

Show Notes

03:38 - What is a TypeScript compiler?

07:49 - Babel

  • Transpiler
  • It doesn't do typechecking
  • New JS features that aren't in TypeScript yet

10:22 - SWC

13:03 - Deno

13:36 - Surcase

14:46 - ESBuild

  • Compiles, but doesn't do any type checking
  • Fastest

17:39 - What about bundlers?

  • Parcel
  • Snowpack
  • Webpack
  • ESBuild
  • When might you still need a bundler?
    • To handle different types of files that are non-standard
      • Like importing CSS and images
  • Treeshaking
  • Smaller bundle files
    • Typescript can concatenate to a single file, or all .js files, but smaller / smarter bundles still need a tool for that
  • Polyfills
    • Typescript does convert to syntax, but will not polyfill features
    • Something like Promise
      • Syntax can be transpiled to old code
      • Methods like allSettled aren't


Tweet us your tasty treats!