Type Assertions & Type Casting | Typescript Tutorial for Beginners

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Learn Type Assertions & Type Casting in this Typescript tutorial for beginners. Learn more about type assertions and type casting and complete a Typescript student challenge in detailed TS tutorial.

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Type Assertions & Type Casting | Typescript Tutorial for Beginners

(00:00) Intro
(00:05) Welcome
(00:28) Type Assertions vs Type Casting
(01:18) What are Type Assertions?
(01:58) Starter Code
(03:44) Converting Types with Assertions
(04:53) Angle Bracket Syntax instead of "as"
(05:55) Narrowing Return Values with Assertions
(08:37) Caution: Assertions allow mistakes!
(10:07) Double Casting and the unknown type
(12:03) DOM Selection Types
(16:19) Non-Null Assertions
(17:43) Angle Brackets and the DOM
(18:14) Student Challenge
(21:27) Solution 1: Beginners
(24:13) Solution 2: Type Assertion

Corrections:
(13:50) Syntax error: document.getElementById('img') is what is needed if the element has an id set to "img". This does not change the concept I'm discussing. Just tired eyes and a syntax error.

📚 Suggested Pre-requisites for this Typescript course:
🔗JavaScript for Beginners full course: https://youtu.be/EfAl9bwzVZk

📚 Tutorial References:
🔗 Typescript Official Website: https://www.typescriptlang.org/
🔗 Anders Hejlsberg, Creator of Typescript and C# Interview: https://dev.to/destrodevshow/typescript-and-c-both-created-by-the-same-person-named-anders-hejlsberg-42g4
🔗 Stackoverflow Survey Results: https://survey.stackoverflow.co/2022/#technology-most-popular-technologies
🔗 MDN - Static Typing: https://developer.mozilla.org/en-US/docs/Glossary/Static_typing
🔗 MDN - Dynamic Typing: https://developer.mozilla.org/en-US/docs/Glossary/Dynamic_typing
🔗 MDN - Type Coercion: https://developer.mozilla.org/en-US/docs/Glossary/Type_coercion
🔗 TS Type Assertions: https://www.typescriptlang.org/docs/handbook/2/everyday-types.html#type-assertions

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Видео Type Assertions & Type Casting | Typescript Tutorial for Beginners канала Dave Gray