transition-timing-function = 
  <easing-function>#  
<easing-function> = 
  <linear-easing-function>        |
  <cubic-bezier-easing-function>  |
  <step-easing-function>          
<linear-easing-function> = 
  linear      |
  <linear()>  
<cubic-bezier-easing-function> = 
  ease              |
  ease-in           |
  ease-out          |
  ease-in-out       |
  <cubic-bezier()>  
<step-easing-function> = 
  step-start  |
  step-end    |
  <steps()>   
<linear()> = 
  linear( [ <number> && <percentage>{0,2} ]# )  
<cubic-bezier()> = 
  cubic-bezier( [ <number [0,1]> , <number> ]#{2} )  
<steps()> = 
  steps( <integer> , <step-position>? )  
<step-position> = 
  jump-start  |
  jump-end    |
  jump-none   |
  jump-both   |
  start       |
  end         
  
    
    transition-timing-function: ease
<div class="parent">
  <div class="box">Lorem</div>
</div>
.parent {
  width: 250px;
  height: 125px;
}
.box {
  width: 100px;
  height: 100px;
  background-color: red;
  font-size: 20px;
  left: 0px;
  top: 0px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: ease;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: ease;
}
.box1 {
  width: 50px;
  height: 50px;
  background-color: blue;
  color: yellow;
  font-size: 18px;
  left: 150px;
  top: 25px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: ease;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: ease;
}
function updateTransition() {
  var el = document.querySelector("div.box");
  if (el) {
    el.className = "box1";
  } else {
    el = document.querySelector("div.box1");
    el.className = "box";
  }
  return el;
}
var intervalID = window.setInterval(updateTransition, 7000);
transition-timing-function: ease-in
<div class="parent">
  <div class="box">Lorem</div>
</div>
.parent {
  width: 250px;
  height: 125px;
}
.box {
  width: 100px;
  height: 100px;
  background-color: red;
  font-size: 20px;
  left: 0px;
  top: 0px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: ease-in;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: ease-in;
}
.box1 {
  width: 50px;
  height: 50px;
  background-color: blue;
  color: yellow;
  font-size: 18px;
  left: 150px;
  top: 25px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: ease-in;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: ease-in;
}
function updateTransition() {
  var el = document.querySelector("div.box");
  if (el) {
    el.className = "box1";
  } else {
    el = document.querySelector("div.box1");
    el.className = "box";
  }
  return el;
}
var intervalID = window.setInterval(updateTransition, 7000);
transition-timing-function: ease-out
<div class="parent">
  <div class="box">Lorem</div>
</div>
.parent {
  width: 250px;
  height: 125px;
}
.box {
  width: 100px;
  height: 100px;
  background-color: red;
  font-size: 20px;
  left: 0px;
  top: 0px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: ease-out;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: ease-out;
}
.box1 {
  width: 50px;
  height: 50px;
  background-color: blue;
  color: yellow;
  font-size: 18px;
  left: 150px;
  top: 25px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: ease-out;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: ease-out;
}
function updateTransition() {
  var el = document.querySelector("div.box");
  if (el) {
    el.className = "box1";
  } else {
    el = document.querySelector("div.box1");
    el.className = "box";
  }
  return el;
}
var intervalID = window.setInterval(updateTransition, 7000);
transition-timing-function: ease-in-out
<div class="parent">
  <div class="box">Lorem</div>
</div>
.parent {
  width: 250px;
  height: 125px;
}
.box {
  width: 100px;
  height: 100px;
  background-color: red;
  font-size: 20px;
  left: 0px;
  top: 0px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: ease-in-out;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: ease-in-out;
}
.box1 {
  width: 50px;
  height: 50px;
  background-color: blue;
  color: yellow;
  font-size: 18px;
  left: 150px;
  top: 25px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: ease-in-out;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: ease-in-out;
}
function updateTransition() {
  var el = document.querySelector("div.box");
  if (el) {
    el.className = "box1";
  } else {
    el = document.querySelector("div.box1");
    el.className = "box";
  }
  return el;
}
var intervalID = window.setInterval(updateTransition, 7000);
transition-timing-function: linear
<div class="parent">
  <div class="box">Lorem</div>
</div>
.parent {
  width: 250px;
  height: 125px;
}
.box {
  width: 100px;
  height: 100px;
  background-color: red;
  font-size: 20px;
  left: 0px;
  top: 0px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: linear;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: linear;
}
.box1 {
  width: 50px;
  height: 50px;
  background-color: blue;
  color: yellow;
  font-size: 18px;
  left: 150px;
  top: 25px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: linear;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: linear;
}
function updateTransition() {
  var el = document.querySelector("div.box");
  if (el) {
    el.className = "box1";
  } else {
    el = document.querySelector("div.box1");
    el.className = "box";
  }
  return el;
}
var intervalID = window.setInterval(updateTransition, 7000);
transition-timing-function: step-start
<div class="parent">
  <div class="box">Lorem</div>
</div>
.parent {
  width: 250px;
  height: 125px;
}
.box {
  width: 100px;
  height: 100px;
  background-color: red;
  font-size: 20px;
  left: 0px;
  top: 0px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: step-start;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: step-start;
}
.box1 {
  width: 50px;
  height: 50px;
  background-color: blue;
  color: yellow;
  font-size: 18px;
  left: 150px;
  top: 25px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: step-start;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: step-start;
}
function updateTransition() {
  var el = document.querySelector("div.box");
  if (el) {
    el.className = "box1";
  } else {
    el = document.querySelector("div.box1");
    el.className = "box";
  }
  return el;
}
var intervalID = window.setInterval(updateTransition, 7000);
transition-timing-function: step-end
<div class="parent">
  <div class="box">Lorem</div>
</div>
.parent {
  width: 250px;
  height: 125px;
}
.box {
  width: 100px;
  height: 100px;
  background-color: red;
  font-size: 20px;
  left: 0px;
  top: 0px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: step-end;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: step-end;
}
.box1 {
  width: 50px;
  height: 50px;
  background-color: blue;
  color: yellow;
  font-size: 18px;
  left: 150px;
  top: 25px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: step-end;
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: step-end;
}
function updateTransition() {
  var el = document.querySelector("div.box");
  if (el) {
    el.className = "box1";
  } else {
    el = document.querySelector("div.box1");
    el.className = "box";
  }
  return el;
}
var intervalID = window.setInterval(updateTransition, 7000);
transition-timing-function: steps(4, end)
<div class="parent">
  <div class="box">Lorem</div>
</div>
.parent {
  width: 250px;
  height: 125px;
}
.box {
  width: 100px;
  height: 100px;
  background-color: red;
  font-size: 20px;
  left: 0px;
  top: 0px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: steps(4, end);
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: steps(4, end);
}
.box1 {
  width: 50px;
  height: 50px;
  background-color: blue;
  color: yellow;
  font-size: 18px;
  left: 150px;
  top: 25px;
  position: absolute;
  -webkit-transition-property: width height background-color font-size left top
    color;
  -webkit-transition-duration: 2s;
  -webkit-transition-timing-function: steps(4, end);
  transition-property: width height background-color font-size left top color;
  transition-duration: 2s;
  transition-timing-function: steps(4, end);
}
function updateTransition() {
  var el = document.querySelector("div.box");
  if (el) {
    el.className = "box1";
  } else {
    el = document.querySelector("div.box1");
    el.className = "box";
  }
  return el;
}
var intervalID = window.setInterval(updateTransition, 7000);