11. Builder Design Pattern in JavaScript | Faceted Builder & Fluent Interface Explained with Code

In this video, we explore the Builder Design Pattern in JavaScript using a real-world, production-style example. You’ll learn: What the Builder Pattern is and why it exists How to build a complex object step by step How Faceted Builder (Builder Facade) works How Fluent Interfaces enable readable method chaining Where to place validation logic Whether this design pattern is correct or over-engineered We walk through the code line by line, explaining every class and design decision, making this video perfect for: JavaScript developers Frontend & backend engineers System design learners Interview preparation Design pattern beginners & intermediates If you want clean, readable object construction instead of messy constructors, this video is for you. 👍 Like 📌 Subscribe 🔔 Turn on notifications for more design pattern videos Github Link: https://github.com/leelanarasimha Instagram: https://www.instagram.com/leelawebdev/ Telegram: http://t.me/LeelaWebDev Facebook Page: https://www.facebook.com/LeelaWebDev Twitter Page: https://twitter.com/leelanarsimha Linkedin: https://www.linkedin.com/in/leela-narasimha-reddy-86517948/ GitHub: https://github.com/leelanarasimha Youtube Page: https://www.youtube.com/leelawebdev If you like my video, please subscribe to my channel. My Playlists: React Complete Course: https://www.youtube.com/watch?v=LMFAaNWmKII&list=PL_euSNU_eLbfuahgrm63xLCWfpl2MaTAr Vue Complete Course: https://www.youtube.com/watch?v=x0uc670hw_8&list=PL_euSNU_eLbedoBv-RllKj_f2Yh--91nZ Angular NGRX Complete Course: https://www.youtube.com/watch?v=3WI5BEXVkmE&list=PL_euSNU_eLbdg0gKbR8zmVJb4xLgHR7BX Angular Complete Course: https://www.youtube.com/watch?v=wI18jE_LHME&list=PL_euSNU_eLbeAJxvVdJn5lhPWX9IWHhxs TypeScript Complete Course: https://www.youtube.com/watch?v=xns0Vaip4wc&list=PL_euSNU_eLbfJEwuNa43lM89yfev537Mj ES6 Complete Course: https://www.youtube.com/watch?v=tt1SkTpHUUU&list=PL_euSNU_eLbfIr88Sgtalv4W58mTW07V4 Javascript Complete Course: https://www.youtube.com/watch?v=JZmwaniKUUc&list=PL_euSNU_eLbeHPrIcllJ1_9hdcffwGuWi GIT Complete Course: https://www.youtube.com/watch?v=vMdSqMf6BPY&list=PL_euSNU_eLbegnt7aR8I1gXfLhKZbxnYX ESLint Complete Course: https://www.youtube.com/watch?v=OYrIfgi_Ghg&list=PL_euSNU_eLbeVd_eDmWzUpEmXizWQRmEm RxJS Complete Course: https://www.youtube.com/watch?v=Q-iZ1JHA0GE&list=PL_euSNU_eLbc0HclFbirIaMXaXzQJ_K4n Declarative Reactive Programming in Angular Complete Course: https://www.youtube.com/watch?v=P38auPts2vs&list=PL_euSNU_eLberdNLX5idpheqHLjdZltJy Angular CLI Complete Course Tutorial: https://www.youtube.com/watch?v=iEPegoPPHDk&list=PL_euSNU_eLbfmSwZYA3ab3a3JGQk8pQdZ Angular UnitTesting Complete Course: https://www.youtube.com/watch?v=VnaDJOucT-4&list=PL_euSNU_eLbcqJ6_Z3FOZJ8mLZ2oMFItV My Courses Playlist Page: https://www.youtube.com/c/LeelaWebDev/playlists #leelawebdev Join this channel to get access to perks: https://www.youtube.com/channel/UC1J-YH25LCjvLnFjy7WDqGA/join