setTimeout.js

var log = console.log

log("Inside global execution context")

function functionOne() {
   log("Inside function one")
  
  function setTimeoutFunction() {
    log("Inside setTimeoutFunction: I will be executed atleast after 1 sec")
  }  
  
  setTimeout(setTimeoutFunction, 1000)
   
  for(var i = 0; i < 10000000000; i++) {
     // Blocking code. This makes the for loop to execute for more than 1 second
     // Still setTimeoutFunction is not executed. It gets executed only after 
     // last statement of the code
  }
  
  log("Exiting functionOne")
}

functionOne()

log("Exiting global execution context")