How to add delay using setTimeout for every iteration?

Question

This creates a 2 second delay and runs the loop. I need to create a 2 second delay for every iteration, not just once.

var myArray = ['test1','test2','test3'];

function doSetTimeout(index) {
  setTimeout(function() { console.log(myArray[index]) }, 2000);
}

var index;
for (index = 0; index < myArray.length; ++index) {    
    doSetTimeout(index)
}

Expected result would be:

test1 
(2 second delay)
test2 
(2 second delay)
test3

Answer 1

Just multiply your delay by the index

var myArray = ['test1','test2','test3'];

function doSetTimeout(index) {
  setTimeout(function() { console.log(myArray[index]) }, index * 2000;
}

var index;
for (index = 0; index < myArray.length; ++index) {
    doSetTimeout(index)
}