P20- Polyfill Power:Mastering JavaScript from the Ground Up with forEach() #coding #javascript #tech

✅ Key Takeaways
☑️ What is a Polyfill?
☑️ Why Use Polyfills?

Key Concepts Covered:
☑️ this context handling
☑️ Error handling for null or non-function inputs
☑️ Iterating only over valid indices (sparse arrays)
☑️ Hands-On Understanding

#JavaScript #Polyfill #ForEach #CodeLikeAPro #WebDev #ES5toES6 #JSInternals #FrontendMastery #JSBasics #DevTips