Union types let us tell TypeScript a value can be of one type, or another type.
Example:
const run = (a: number | string) => {
//...
}
In this case the parameter a can be either a string, or a number, but nothing else.
Lessons in 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 |
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