settimeout inside for in code example

Example 1: settimeout inside loop

//you can leave the sleep constant
const sleep = (milliseconds) => {
  return new Promise(resolve => setTimeout(resolve, milliseconds))
}

const doSomething = async () => {
  for (/*for loop statements here*/) {
  //code before sleep goes here, just change the time below in milliseconds
   await sleep(1000)
  //code after sleep goes here 
    }
  }
doSomething();

Example 2: javascript this in settimeout

function func() {
  this.var = 5;
  
  this.changeVar = function() {
    setTimeout(() => { //Don't use function, use arrow function so 'this' refers to 'func' and not window
      this.var = 10;
    }, 1000);
  }
}

var a = new func();
a.changeVar();