TypeScript: Upgrades and Features

Take advantage of the latest features in TypeScript. Learn how to leverage external helpers, optional type checks, constant-named properties, and more.

Introduction

• Learn about TypeScript updates
• Course prerequisites
• Using the exercise files

1. Setting Up TypeScript

• Update your local environment
• IDEs with great TypeScript support
• Where to find help and documentation

2. Features from Previous Versions

• Tagged union, null, or undefined types
• Control flow analysis and read-only properties
• External helpers and module enhancements
• Mapped types and object spread and rest
• Object type and new.target
• ES3 and ES5 generators and iterators
• TypeScript optional checks
• Catch clause and localized diagnostics

3. Features in the Latest Version

• Constant-named properties
• Defined assignment assertions
• Type guards inferred with the in operator
• Support for ES numeric separators

Conclusion

• Next steps