Typescript Index Signatures, keyof Assertions & the Record Utility Type
Typescript Index Signatures, keyof Assertions & the Record utility type are all useful when creating object types and accessing their properties dynamically. We look at examples using all 3 in this TS tutorial.
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Typescript Index Signatures, keyof Assertions & the Record Utility Type
(00:00) Intro
(00:05) Welcome
(00:30) Starter code and set up
(02:00) What are index signatures?
(02:33) Why you need an index signature
(06:09) Index signature syntax
(08:14) readonly modifier
(08:52) Non-existing properties
(09:52) Required properties combined with an index signature
(11:10) Optional properties
(13:40) keyof Assertions
(16:53) Record utility type vs index signatures
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🔗JavaScript for Beginners full course:
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🔗 Stackoverflow Survey Results: #technology-most-popular-technologies
🔗 MDN - Static Typing:
🔗 MDN - Dynamic Typing:
🔗 MDN - Type Coercion:
🔗 TS Type Assertions: #type-assertions
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