15. Factory Method Design Pattern in JavaScript | SOLID + Dependency Injection Explained

In this video, we deep dive into the Factory Method Design Pattern using a real-world Vehicle example in JavaScript and Node.js. You’ll learn: • What the Factory Method pattern is • Why if and switch statements violate the Open–Closed Principle • How Factory Method follows SOLID principles • How Dependency Injection works in Node.js • Difference between static factory and Factory Method • How to design extensible, testable code This video is perfect for: • JavaScript developers • Node.js backend developers • Frontend developers (Vue / React / Angular) • Anyone preparing for design pattern interviews If you want clean, scalable, and maintainable JavaScript code — this pattern is a must-know. 👍 Like | 💬 Comment | 🔔 Subscribe for more Design Patterns in JavaScript 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