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    transition-timing-function

    Summary

    The CSS transition-timing-function property is used to describe how the intermediate values of the CSS properties being affected by a transition effect are calculated. This in essence lets you establish an acceleration curve, so that the speed of the transition can vary over its duration.

    This acceleration curve is defined using one <timing-function> for each property to be transitioned. 

    You may specify multiple timing functions; each one will be applied to the corresponding property as specified by the transition-property property, which acts as a master list. If there are fewer functions specified than in the master list, missing values are set to the initial value (ease). If there are more timing functions, the list is simply truncated to the right size. In both case the CSS declaration stays valid.

    Syntax

    Formal syntax: <timing-function>#
    
    transition-timing-function: ease
    transition-timing-function: ease-in
    transition-timing-function: ease-out
    transition-timing-function: ease-in-out
    transition-timing-function: linear
    transition-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1)
    transition-timing-function: step-start
    transition-timing-function: step-end
    transition-timing-function: steps(4, end)
    
    transition-timing-function: ease, step-start, cubic-bezier(0.1, 0.7, 1.0, 0.1)
    
    transition-timing-function: inherit
    

    Values

    <timing-function>
    Each <timing-function> represents the timing function to link to the corresponding property to transition, as defined in transition-property.

    Examples

    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);
    

    Specifications

    Specification Status Comment
    CSS Transitions Working Draft  

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes)-webkit 4.0 (2.0)-moz
    16.0 (16.0)
    10 11.6-o
    12.10 #
    (Yes)-webkit
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes)-webkit (Yes)-webkit 4.0 (2.0)-moz
    16.0 (16.0)
    ? ? (Yes)-webkit

    See also

    Document Tags and Contributors

    Contributors to this page: Sheppy, fscholz, yyss, ethertank, CutenessOverload, kscarfone, teoli
    Last updated by: kscarfone,
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