WarsawJS Workshop #37 - TypeScript

Agenda

1. Writing JavaScript and trying to add types
2. Writing TypeScript from scratch
3. Configuring a TypeScript project from scratch

Topics to cover

1. Types

• Boolean
• Number
• String
• Array
• Null and Undefined
• Any (every type at once)
• Void (opposite of any - no type)
• Never (something that never occurs)

2. Interfaces

• Basic structures
• Optional fields
• Function fields
• Number indexes
• String indexes

3. Classes

• Syntax
• Inheritance
• Access modifiers
• Parameter properties
• Getters and setters
• Static

4. Functions

• Function syntax
• Optional parameters
• Default parameters
• Function types
• Rest parameters
• Overloads

5. Generics

• Normal generics
• Generics with extends keyword

6. Advanced TypeScript

• Tuple
• Enum
• Type keyword
• Discriminated unions
• Type guards
• Readonly
• Abstract classes
• Function interfaces
• Hybrid types
• This in functions

7. Configuration from scratch

• Tsconfig JSON
• Type declarations for libraries
• Stack traces
• Tests