'use strict'

let timeoutID1 = setTimeout(function(arg1, arg2) {
  console.log(arg1)
  console.log(arg2)
}, 2000, 'hello1', 'go1')

let timeoutID2 = setTimeout(function(arg1, arg2) {
  console.log(arg1)
  console.log(arg2)
}, 2000, 'hello2', 'go2')

// timeoutID is a number in broswer，but a complex object in node.js
console.log(timeoutID1, timeoutID2)

clearTimeout(timeoutID2)