Web Dev Roadmap for Beginners (Free!): https://bit.ly/DaveGrayWebDevRoadmap 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. 🚀 Become a full-stack web dev with Zero To Mastery Courses: - The Complete Web Developer: https://bit.ly/WebDevMaster - Master the Coding Interview: https://bit.ly/FAANGInterview - Junior to Senior Dev Roadmap: https://bit.ly/WebDevRoadmap-JrtoSr 🚩 Subscribe ➜ https://bit.ly/3nGHmNn 📬 Course Updates ➜ https://courses.davegray.codes/ ❓ Questions - Please post them to my Discord ➜ https://discord.gg/neKghyefqh ☕ Buy Me A Coffee ➜ https://www.buymeacoffee.com/davegray 👇 Follow Me On Social Media: Github: https://github.com/gitdagray Twitter: https://twitter.com/yesdavidgray LinkedIn: https://www.linkedin.com/in/davidagray/ 🔗 All Resources for this Typescript Course: https://github.com/gitdagray/typescript-course 🔗 Playlist for this Typescript Course: http://bit.ly/3GcNJ78 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 📚 Suggested Pre-requisites for this Typescript course: 🔗JavaScript for Beginners full course: https://www.youtube.com/watch?v=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 ⚙ Web Dev Tools: 🔗 Chrome Browser: https://www.google.com/chrome/ 🔗 Visual Studio Code (VS Code): https://code.visualstudio.com/ 🔗 Node.js & npm: https://nodejs.org/ 🔗 Live Server VS Code Extension: https://marketplace.visualstudio.com/items?itemName=ritwickdey.LiveServer Was this Typescript Index Signatures, keyof Assertions & Record utility type tutorial helpful? If so, please share. Let me know your thoughts in the comments. #typescript #index #signatures