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Full Course: TypeScript: From First Steps to Professional: https://www.frontendmasters.com/courses/typescript-first-steps/?utm_source=youtube&utm_medium=course_link&utm_campaign=typescript-first-steps About this Course: Learn how to move from JavaScript to TypeScript while building real projects that highlight the power of static typing. Add type annotations, interfaces, and generics to write safer, more predictable code. Configure the TypeScript compiler, reuse types across files, and convert both client and server code to TypeScript to achieve add type safety across your entire codebase! Find Frontend Masters Online: Twitter: https://twitter.com/FrontendMasters LinkedIn: https://www.linkedin.com/company/frontend-masters/ Facebook: https://www.facebook.com/FrontendMasters Instagram: https://instagram.com/FrontendMasters About Us: Advance your skills with in-depth, modern front-end engineering courses — our 200+ high-quality courses and 18 curated learning paths will guide you from mid-level to senior developer! Try our courses for free for 7 days: https://www.frontendmasters.com/?utm_source=youtube&utm_medium=home_link&utm_campaign=typescript-first-steps Sections: 0:00 - Introduction & Course Description 0:50 - TypeScript Syntax: Variables & Functions 6:23 - Union Types 11:32 - User API Types?