---
title: transition-timing-function
slug: Web/CSS/transition-timing-function
translation_of: Web/CSS/transition-timing-function
---
<div>{{CSSRef}}</div>

<p><strong><code>transition-timing-function</code></strong> CSS 屬性用於表示各個被<a href="/zh-TW/docs/Web/CSS/CSS_Transitions/Using_CSS_transitions">動畫特效</a>影響的屬性的區間值計算方式。</p>

<div>{{EmbedInteractiveExample("pages/css/transition-timing-function.html")}}</div>

<p class="hidden">這個互動式範例存放在 GitHub 專案中，如果你想貢獻，請 Clone <a href="https://github.com/mdn/interactive-examples">https://github.com/mdn/interactive-examples</a> 並發送 PR。</p>

<p> </p>

<p>本質上，這個屬性讓你使用加速度曲線來表示動畫變換的速度。</p>

<p>而每個可以動畫化的屬性使用一個 {{cssxref("&lt;timing-function&gt;")}} 作為加速度曲線。</p>

<p> </p>

<p>你也許有許多時間函數，而你可以透過使用 {{ cssxref("transition-property") }} 屬性來個別設置。如果有前述清單的數量超過時間函數的數量，則會使用預設值 <code>ease</code>；如果少於那多餘的時間函數會被忽略，在這兩種情況，CSS 宣告總會有效。</p>

<h2 id="語法">語法</h2>

<pre class="brush:css no-line-numbers">/* Keyword */
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: step-start;
transition-timing-function: step-end;

/* 函數 */
transition-timing-function: steps(4, end);
transition-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1);
transition-timing-function: frames(10);

/* 多個函數 */
transition-timing-function: ease, step-start, cubic-bezier(0.1, 0.7, 1.0, 0.1);

/* 全域值 */
transition-timing-function: inherit;
transition-timing-function: initial;
transition-timing-function: unset;

/* 包含 transition-property */
transition-property: width, height;
transition-timing-function: ease-in, ease-out; // ease-in to width and ease-out to height

</pre>

<h3 id="值">值</h3>

<dl>
 <dt><code>&lt;timing-function&gt;</code></dt>
 <dd>每個 {{cssxref("&lt;timing-function&gt;")}} 連結到對應的動畫化屬性，請參考 {{ cssxref("transition-property") }}。</dd>
</dl>

<h3 id="公式語法">公式語法</h3>

<pre class="syntaxbox">{{csssyntax}}</pre>

<h2 id="範例">範例</h2>

<div>
<div id="ttf_ease" style="width: 251px; display: inline-block; margin-right: 1px; margin-bottom: 1px;">
<p><code>transition-timing-function: ease</code></p>

<div class="hidden">
<pre class="brush:html"> &lt;div class="parent"&gt;
  &lt;div class="box"&gt;Lorem&lt;/div&gt;
&lt;/div&gt;
  </pre>

<pre class="brush:css;">.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;
}
</pre>

<pre class="brush:js">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);
</pre>
</div>

<div>{{EmbedLiveSample("ttf_ease",275,150)}}</div>
</div>

<div id="ttf_easein" style="width: 251px; display: inline-block; margin-right: 1px; margin-bottom: 1px;">
<p><code>transition-timing-function: ease-in</code></p>

<div class="hidden">
<pre class="brush:html"> &lt;div class="parent"&gt;
  &lt;div class="box"&gt;Lorem&lt;/div&gt;
&lt;/div&gt;
  </pre>

<pre class="brush:css;">.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;
}
</pre>

<pre class="brush:js">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);
</pre>
</div>

<div>{{EmbedLiveSample("ttf_easein",275,150)}}</div>
</div>

<div id="ttf_easeout" style="width: 251px; display: inline-block; margin-right: 1px; margin-bottom: 1px;">
<p><code>transition-timing-function: ease-out</code></p>

<div class="hidden">
<pre class="brush:html"> &lt;div class="parent"&gt;
  &lt;div class="box"&gt;Lorem&lt;/div&gt;
&lt;/div&gt;
  </pre>

<pre class="brush:css;">.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;
}
</pre>

<pre class="brush:js">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);
</pre>
</div>

<div>{{EmbedLiveSample("ttf_easeout",275,150)}}</div>
</div>

<div id="ttf_easeinout" style="width: 251px; display: inline-block; margin-right: 1px; margin-bottom: 1px;">
<p><code>transition-timing-function: ease-in-out</code></p>

<div class="hidden">
<pre class="brush:html"> &lt;div class="parent"&gt;
  &lt;div class="box"&gt;Lorem&lt;/div&gt;
&lt;/div&gt;
  </pre>

<pre class="brush:css;">.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;
}
</pre>

<pre class="brush:js">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);
</pre>
</div>

<div>{{EmbedLiveSample("ttf_easeinout",275,150)}}</div>
</div>
</div>

<div id="ttf_linear" style="width: 251px; display: inline-block; margin-right: 1px; margin-bottom: 1px;">
<p><code>transition-timing-function: linear</code></p>

<div class="hidden">
<pre class="brush:html"> &lt;div class="parent"&gt;
  &lt;div class="box"&gt;Lorem&lt;/div&gt;
&lt;/div&gt;
  </pre>

<pre class="brush:css;">.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;
}
</pre>

<pre class="brush:js">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);
</pre>
</div>

<div>{{EmbedLiveSample("ttf_linear",275,150)}}</div>
</div>

<div id="ttf_stepstart" style="width: 251px; display: inline-block; margin-right: 1px; margin-bottom: 1px;">
<p><code>transition-timing-function: step-start</code></p>

<div class="hidden">
<pre class="brush:html"> &lt;div class="parent"&gt;
  &lt;div class="box"&gt;Lorem&lt;/div&gt;
&lt;/div&gt;
  </pre>

<pre class="brush:css;">.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;
}
</pre>

<pre class="brush:js">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);
</pre>
</div>

<div>{{EmbedLiveSample("ttf_stepstart",275,150)}}</div>
</div>

<div id="ttf_stepend" style="width: 251px; display: inline-block; margin-right: 1px; margin-bottom: 1px;">
<p><code>transition-timing-function: step-end</code></p>

<div class="hidden">
<pre class="brush:html"> &lt;div class="parent"&gt;
  &lt;div class="box"&gt;Lorem&lt;/div&gt;
&lt;/div&gt;
  </pre>

<pre class="brush:css;">.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;
}
</pre>

<pre class="brush:js">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);
</pre>
</div>

<div>{{EmbedLiveSample("ttf_stepend",275,150)}}</div>
</div>

<div id="ttf_step4end" style="width: 251px; display: inline-block; margin-right: 1px; margin-bottom: 1px;">
<p><code>transition-timing-function: steps(4, end)</code></p>

<div class="hidden">
<pre class="brush:html"> &lt;div class="parent"&gt;
  &lt;div class="box"&gt;Lorem&lt;/div&gt;
&lt;/div&gt;
  </pre>

<pre class="brush:css;">.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);
}
</pre>

<pre class="brush:js">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);
</pre>
</div>

<div>{{EmbedLiveSample("ttf_step4end",275,150)}}</div>
</div>

<h2 id="規格">規格</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">規格</th>
   <th scope="col">狀態</th>
   <th scope="col">備註</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{ SpecName('CSS3 Transitions', '#transition-timing-function-property', 'transition-timing-function') }}</td>
   <td>{{ Spec2('CSS3 Transitions') }}</td>
   <td>初始定義</td>
  </tr>
 </tbody>
</table>

<p>{{cssinfo}}</p>

<h2 id="相容性">相容性</h2>

<div class="hidden">相容性表格是根據結構化資料自動建立的，如果你想貢獻，請參考 <a href="https://github.com/mdn/browser-compat-data">https://github.com/mdn/browser-compat-data</a> 並發送 PR。</div>

<p>{{Compat("css.properties.transition-timing-function")}}</p>

<h2 id="看更多">看更多</h2>

<ul>
 <li><a href="/zh-TW/docs/CSS/Using_CSS_transitions" title="en/CSS/CSS transitions">使用 CSS transitions</a></li>
 <li>{{ domxref("TransitionEvent") }}</li>
</ul>