TypeScript syntax is often inspired by JavaScript.

In some cases, TS even uses the exact same syntax as JS for a different purpose.

The difference?
JS features focus on values.
TS features focus on types.

Here's a few examples.

Problem: I want to enforce a string format at compile time.

Solution: Use a template literal type.

Full "TypeScript: Deep Dive" course: dometrain.com/course/deep-...

Problem: I want to ensure my switch statement handles all potential cases.

Solution: Use TypeScript's never type.

Here's how:

Full course: dometrain.com/course/deep-...

Problem: You have complex logic for narrowing a TypeScript type that you'd like to reuse in a few spots.

Solution: Consider an assertion function.

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It’s live!

“TypeScript: Deep Dive” explores advanced TS concepts:

- Utility types
- Generics
- Mapped types
- Conditional types
- Template literal types
- Runtime validation
- Decorators
- tsconfig techniques

And over 250+ examples!

Get 20% off at launch here: dometrain.com/course/deep-...

Learn TypeScript in 60 seconds.

I think I finally have my phone-friendly vertical video format dialed in.

I'm using an iPad with a Neewer teleprompter as my monitor so I can look directly at the code as I narrate. And Camtasia creates the slick captions.

Thoughts?

In TypeScript, interfaces and type aliases can "extend" each another.

- An interface can extend a type.
- A type alias can "extend" an interface (via a type intersection).

Clip from "TypeScript: Getting Started" on Dometrain: dometrain.com/course/getti...

Just submitted the final clips for "TypeScript: Getting Started". 🎉

The course explores primitive types, arrays, tuples, enums, interfaces, functions, classes, modules, using TS with and without a compiler, features to avoid, and much more.

Publishing this week on Dometrain!

Just published: Mastering Mocking in Automated Tests

I talk with @kettanaito.com about best practices for writing mocks including mocking mistakes, finding mocking boundaries, mock data, distinctions between different types of testing, and much more.

Studio setup 2.0:

- Closed blinds (to control the light)
- New 5600K keylight & backlight
- Camera white balance at 5600K
- New camera angle (hides door)
- Recording in 4K/24p at 1/50
- Cleaner background
- Added accent lights
- Brushed my hair

Thoughts? Suggestions?