Executuon context stack example

executionContextStackExample.js

console.log("Inside global execution context")

// 'a' will be stored on ECS as it's a primitive value
var a = 10;

// Only reference of functionOne will be stored inside stack.
// funtionOne definition itseld will be stored on heap
function functionOne() {
  console.log("Inside functionOne exectuon context")
  
  // 'b' will be stored on ECS as it's a primitive value
  var b = 5;
  
  // Only object reference will be stored on the stack. 
  // Object itself will stored on heap
  var obj = {
    "name": "Virat",
    "age": 30
  }
  
  function functionTwo() {
    console.log("Inside functionTwo exectuon context")
    console.log("Exiting functionTwo exectuon context")
  }
  
  functionTwo()
  console.log("Exiting functionOne exectuon context")
}

functionOne()
console.log("Exiting global execution context")

// Program Ends - Execution stack becomes empty. 
// Heap memory may or may not be released, it depends on garbage 
// collector