JavaScript Foundations

Variables

Reference

• https://www.w3schools.com/js/js_function_closures.asp

Closure Function

Situation

• We need a global variable but other functions should not be able to access/modify it - as any global variable are accessible inside functions.
• We need a local variable but that should persist previous state/value - as any local/private variables are reinitialized every time function is called.

Example

Real World Scenario