transition-delay

版本：CSS3

CSS的transition-delay属性规定了在过渡效果开始作用之前需要等待的时间。值以秒（s）或毫秒（ms）为单位，表明动画过渡效果将在何时开始。取值为正时会延迟一段时间来响应过渡效果；取值为负时会导致过渡立即开始。你可以指定多个延迟时间，每个延迟将会分别作用于你所指定的相符合的css属性（transition-property）

示例

/* <time>值 */
transition-delay: 3s;
transition-delay: 2s, 4ms;

/* 全局变量 */
transition-delay: inherit;
transition-delay: initial;
transition-delay: unset;

浏览器支持

IE10以上浏览器都支持transition-delay

语法

transition-delay:<timing-function>

取值：

• <timing-function>：通过transition-property中定义被过渡属性，每个<timing-function>的值代表与这个属性相对应的timing function.

说明：

检索或设置对象延迟过渡的时间。

• 如果提供多个属性值，以逗号进行分隔。
• 对应的脚本特性为transitionDelay。

这是一个实验中的功能
此功能某些浏览器尚在开发中，请参考浏览器兼容性表格以得到在不同浏览器中适合使用的前缀。由于该功能对应的标准文档可能被重新修订，所以在未来版本的浏览器中该功能的语法和行为可能随之改变。

实例

transition-delay: 0.5s

<div class="parent">
  <div class="box">lorem</div>
</div>

//CSS
.parent { width: 250px; height:125px;}
.box {
    width: 100px;
    height: 100px;
    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-delay:0.5s;
    -webkit-transition-timing-function: linear;
    transition-property: width height background-color font-size left top color;
    transition-duration:2s;
    transition-delay:0.5s;
    transition-timing-function: linear;
}
.box1{
    width: 50px;
    height: 50px;
    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-delay:0.5s;
    -webkit-transition-timing-function: linear;
    transition-property: width height background-color font-size left top color;
    transition-duration:2s;
    transition-delay:0.5s;
    transition-timing-function: linear;
}

//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);

transition-delay: 1s

<div class="parent">
  <div class="box">lorem</div>
</div>

//CSS
.parent { width: 250px; height:125px;}
.box {
    width: 100px;
    height: 100px;
    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-delay:1s;
    -webkit-transition-timing-function: linear;
    transition-property: width height background-color font-size left top color;
    transition-duration:2s;
    transition-delay:1s;
    transition-timing-function: linear;
}
.box1{
    width: 50px;
    height: 50px;
    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-delay:1s;
    -webkit-transition-timing-function: linear;
    transition-property: width height background-color font-size left top color;
    transition-duration:2s;
    transition-delay:1s;
    transition-timing-function: linear;
}

//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);

transition-delay: 2s

<div class="parent">
  <div class="box">lorem</div>
</div>

//CSS
.parent { width: 250px; height:125px;}
.box {
    width: 100px;
    height: 100px;
    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-delay:2s;
    -webkit-transition-timing-function: linear;
    transition-property: width height background-color font-size left top color;
    transition-duration:2s;
    transition-delay:2s;
    transition-timing-function: linear;
}
.box1{
    width: 50px;
    height: 50px;
    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-delay:2s;
    -webkit-transition-timing-function: linear;
    transition-property: width height background-color font-size left top color;
    transition-duration:2s;
    transition-delay:2s;
    transition-timing-function: linear;
}

//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);

transition-delay: 4s

<div class="parent">
  <div class="box">lorem</div>
</div>

//CSS
.parent { width: 250px; height:125px;}
.box {
    width: 100px;
    height: 100px;
    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-delay:4s;
    -webkit-transition-timing-function: ease-in-out;
    transition-property: width height background-color font-size left top color;
    transition-duration:2s;
    transition-delay:4s;
    transition-timing-function: ease-in-out;
}
.box1{
    width: 50px;
    height: 50px;
    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-delay:4s;
    -webkit-transition-timing-function: ease-in-out;
    transition-property: width height background-color font-size left top color;
    transition-duration:2s;
    transition-delay:4s;
    transition-timing-function: ease-in-out;
}

//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);

 transition-delay:2s;
 -webkit-transition-delay:2s; /*safari*/