Hasty Treat - TypeScript Compilers and Build Tools

In this Hasty Treat, Scott and Wes talk about the differences between compilers and build tools in TypeScript. Sanity - Sponsor Sanity.io 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 sanity.io/create. Get an awesome supercharged free developer plan on sanity.io/syntax. 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 Sentry.io and using the coupon code TASTYTREAT during sign up. Show Notes 03:38 - What is a TypeScript compiler? Do we still need Babel / WebPack? 07:49 - Babel Transpiler It doesn’t do typechecking New JS features that aren’t in TypeScript yet 10:22 - SWC Rust based compiler Doesn’t do type checking (yet) https://github.com/swc-project/swc/issues/571

13:03 - Deno Uses tsc right now Might move to Rust https://github.com/denoland/deno/issues/5432

13:36 - Surcase https://github.com/alangpierce/sucrase#transforms

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 Links Syntax 324: TypeScript Fundamentals

Syntax 322: The Deno Show

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