Web Developer Quick Notes Purpose The purpose of web developer quick notes is to keep the most important concepts around JavaScript handy with concrete code examples. We will try to explain the concept in detail as possible here. Contents JavaScript Use Strict Compilers vs Polyfills Pass by value & Pass by reference Problems with isNaN() Hoisting Scope Chain Closures Authors Madhusuthanan B | π» | π Swathi Nanjundaswamy | π»