TypeScript: The editor helps you with type errors

If you pass a string to multiply(), VS Code will show you an error by underlying the problematic part of your code:

Hover that with the mouse, VS Code will tell you more:

Now, regarding TypeScript errors, sometimes they are a bit cryptic. Not in this case. But there is a VS Code extension that helps you by giving actionable information, and it’s called Pretty TypeScript Errors.

Install that, you’ll see different error messages:

This is what happens in the editor.

Lessons this unit:

0: Introduction
1: Your first TypeScript program
2: Types
3: Typing functions
4: ▶︎ The editor helps you with type errors
5: Running TypeScript code
6: Valid types
7: Type aliases and interfaces
8: Union types
9: Typing arrays with generics
10: The DX of editing TypeScript
11: There's more...
12: tsconfig.json COMING SOON
13: Installing types COMING SOON