javascript - 添加 CSS3 过渡展开/折叠

Question

如何添加展开/折叠过渡？

function showHide(shID) {
    if (document.getElementById(shID)) {
        if (document.getElementById(shID + '-show').style.display != 'none') {
            document.getElementById(shID + '-show').style.display = 'none';
            document.getElementById(shID).style.display = 'block';
        } else {
            document.getElementById(shID + '-show').style.display = 'inline';
            document.getElementById(shID).style.display = 'none';
        }
    }
}

.more {
    display: none;
    padding-top: 10px;
}

a.showLink,
a.hideLink {
    text-decoration: none;
    -webkit-transition: 0.5s ease-out;
    background: transparent url('down.gif') no-repeat left;
}

a.hideLink {
    background: transparent url('up.gif') no-repeat left;
}

Here is some text.
<div class="readmore">
    <a href="#" id="example-show" class="showLink" onclick="showHide('example');return false;">Read more</a>
    <div id="example" class="more">
        <div class="text">Here is some more text: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum vitae urna nulla. Vivamus a purus mi. In hac habitasse platea dictumst. In ac tempor quam. Vestibulum eleifend vehicula ligula, et cursus nisl gravida sit amet. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</div>
        <p><a href="#" id="example-hide" class="hideLink" onclick="showHide('example');return false;">Hide</a></p>
    </div>
</div>

http://jsfiddle.net/Bq6eK/1

Answer 1

This是我的自动调整高度的解决方案:

function growDiv() {
  var growDiv = document.getElementById('grow');
  if (growDiv.clientHeight) {
    growDiv.style.height = 0;
  } else {
    var wrapper = document.querySelector('.measuringWrapper');
    growDiv.style.height = wrapper.clientHeight + "px";
  }
  document.getElementById("more-button").value = document.getElementById("more-button").value == 'Read more' ? 'Read less' : 'Read more';
}

#more-button {
  border-style: none;
  background: none;
  font: 16px Serif;
  color: blue;
  margin: 0 0 10px 0;
}

#grow input:checked {
  color: red;
}

#more-button:hover {
  color: black;
}

#grow {
  -moz-transition: height .5s;
  -ms-transition: height .5s;
  -o-transition: height .5s;
  -webkit-transition: height .5s;
  transition: height .5s;
  height: 0;
  overflow: hidden;
}

<input type="button" onclick="growDiv()" value="Read more" id="more-button">

<div id='grow'>
  <div class='measuringWrapper'>
    <div class="text">Here is some more text: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum vitae urna nulla. Vivamus a purus mi. In hac habitasse platea dictumst. In ac tempor quam. Vestibulum eleifend vehicula ligula, et cursus nisl gravida sit
      amet. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.</div>
  </div>
</div>

我使用了 r3bel 发布的解决方法:Can you use CSS3 to transition from height:0 to the variable height of content?