Implement an expand/collapse effect using CSS3 transitions

Question

Implement an expand/collapse effect using CSS3 transitions

How can I implement a smooth expand/collapse effect?

function expandCollapse(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="expandCollapse('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="expandCollapse('example');return false;">Hide</a></p>
    </div>
</div>

http://jsfiddle.net/Bq6eK/1

javascript html css

Answer 1

Answer №1

Here is the solution I came up with to automatically adjust the height:

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

#expand-button {
  border-style: none;
  background: none;
  font: 16px Arial;
  color: green;
  margin: 0 0 10px 0;
}

#resize input:checked {
  color: orange;
}

#expand-button:hover {
  color: purple;
}

#resize {
  -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="resizeDiv()" value="Show more" id="expand-button">

<div id='resize'>
  <div class='measuringWrapper'>
    <div class="text">I added some extra text: 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>

I implemented a workaround inspired by the method shared by r3bel: Is it possible to use CSS3 for transitioning between height:0 and the dynamic height of content?

Answer 2

Here is the solution I came up with to automatically adjust the height:

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

#expand-button {
  border-style: none;
  background: none;
  font: 16px Arial;
  color: green;
  margin: 0 0 10px 0;
}

#resize input:checked {
  color: orange;
}

#expand-button:hover {
  color: purple;
}

#resize {
  -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="resizeDiv()" value="Show more" id="expand-button">

<div id='resize'>
  <div class='measuringWrapper'>
    <div class="text">I added some extra text: 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>

I implemented a workaround inspired by the method shared by r3bel: Is it possible to use CSS3 for transitioning between height:0 and the dynamic height of content?

Answer 3

Answer №2

Click here for a solution that should do the trick. I had to experiment a bit too! :D

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 + '-hide').style.display = 'inline';
      document.getElementById(shID).style.height = '100px';
    } else {
      document.getElementById(shID + '-show').style.display = 'inline';
      document.getElementById(shID + '-hide').style.display = 'none';
      document.getElementById(shID).style.height = '0px';
    }
  }
}

#example {
  background: red;
  height: 0px;
  overflow: hidden;
  transition: height 2s;
  -moz-transition: height 2s;
  /* Firefox 4 */
  -webkit-transition: height 2s;
  /* Safari and Chrome */
  -o-transition: height 2s;
  /* Opera */
}

a.showLink,
a.hideLink {
  text-decoration: none;
  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>

Answer 4

Click here for a solution that should do the trick. I had to experiment a bit too! :D

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 + '-hide').style.display = 'inline';
      document.getElementById(shID).style.height = '100px';
    } else {
      document.getElementById(shID + '-show').style.display = 'inline';
      document.getElementById(shID + '-hide').style.display = 'none';
      document.getElementById(shID).style.height = '0px';
    }
  }
}

#example {
  background: red;
  height: 0px;
  overflow: hidden;
  transition: height 2s;
  -moz-transition: height 2s;
  /* Firefox 4 */
  -webkit-transition: height 2s;
  /* Safari and Chrome */
  -o-transition: height 2s;
  /* Opera */
}

a.showLink,
a.hideLink {
  text-decoration: none;
  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>

Answer 5

Answer №3

Success achieved through the use of this animation technique.

const toggleButton = document.getElementById('toggleButton');
const wrapper = document.querySelector('.wrapper');

toggleButton.addEventListener('click', () => {
  wrapper.classList.toggle('open');
});

.expandable {
  min-height: 0;
  background: gray;
  color: white;
}

/* Initially, set the grid rows to take up no space (height 0).
   This effectively hides the content inside the wrapper element. */
.wrapper {
  display: grid;
  overflow: hidden;
  transition: grid-template-rows 400ms;
  grid-template-rows: 0fr;  /* 0fr means 0 fraction of available space */
}

/* When the 'open' class is applied to the wrapper element, set the grid rows to take up all available space (height 1fr).
   This expands the wrapper and shows the content inside. */
.wrapper.open {
  grid-template-rows: 1fr;  /* 1fr means 1 fraction of available space */
}

<button id="toggleButton">
  Toggle
</button>

<div class="wrapper">
  <div class="expandable">
    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>

Answer 6

Success achieved through the use of this animation technique.

const toggleButton = document.getElementById('toggleButton');
const wrapper = document.querySelector('.wrapper');

toggleButton.addEventListener('click', () => {
  wrapper.classList.toggle('open');
});

.expandable {
  min-height: 0;
  background: gray;
  color: white;
}

/* Initially, set the grid rows to take up no space (height 0).
   This effectively hides the content inside the wrapper element. */
.wrapper {
  display: grid;
  overflow: hidden;
  transition: grid-template-rows 400ms;
  grid-template-rows: 0fr;  /* 0fr means 0 fraction of available space */
}

/* When the 'open' class is applied to the wrapper element, set the grid rows to take up all available space (height 1fr).
   This expands the wrapper and shows the content inside. */
.wrapper.open {
  grid-template-rows: 1fr;  /* 1fr means 1 fraction of available space */
}

<button id="toggleButton">
  Toggle
</button>

<div class="wrapper">
  <div class="expandable">
    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>

Answer 7

Answer №4

After spending hours searching for a simple solution, I realized that the code I needed was not readily available. Determined to create something easy to use without relying on JQuery, I worked on some example code. Through trial and error, I discovered that setting the height and width is crucial for the animation to function properly.

<script>
        function dostuff() {
            if (document.getElementById('MyBox').style.height == "0px") {

                document.getElementById('MyBox').setAttribute("style", "background-color: #45CEE0; height: 200px; width: 200px; transition: all 2s ease;"); 
            }
            else {
                document.getElementById('MyBox').setAttribute("style", "background-color: #45CEE0; height: 0px; width: 0px; transition: all 2s ease;"); 
             }
        }
    </script>
    <div id="MyBox" style="height: 0px; width: 0px;">
    </div>

    <input type="button" id="buttontest" onclick="dostuff()" value="Click Me">

Answer 8

After spending hours searching for a simple solution, I realized that the code I needed was not readily available. Determined to create something easy to use without relying on JQuery, I worked on some example code. Through trial and error, I discovered that setting the height and width is crucial for the animation to function properly.

<script>
        function dostuff() {
            if (document.getElementById('MyBox').style.height == "0px") {

                document.getElementById('MyBox').setAttribute("style", "background-color: #45CEE0; height: 200px; width: 200px; transition: all 2s ease;"); 
            }
            else {
                document.getElementById('MyBox').setAttribute("style", "background-color: #45CEE0; height: 0px; width: 0px; transition: all 2s ease;"); 
             }
        }
    </script>
    <div id="MyBox" style="height: 0px; width: 0px;">
    </div>

    <input type="button" id="buttontest" onclick="dostuff()" value="Click Me">

Answer 9

Answer №5

http://jsfiddle.net/Bq6eK/215/

Instead of adjusting your code, I came up with my own solution. It may not be exactly what you were looking for, but perhaps you can use it as a starting point. I made sure to add comments to explain the changes I made.

To address the issue of not setting the height in JavaScript, I included 'maxHeight' as a parameter in the toggleHeight JS function. This way, it can be defined in the HTML for each expandable div.

I'll be honest, I'm not an expert in front-end languages, and there's a small glitch where the 'Show/hide' button needs to be clicked twice initially for the animation to begin. It could be a focus-related problem.

Another flaw in my solution is that the hidden text can be revealed by selecting and dragging within the div. You can copy and paste the hidden text to a visible area without clicking the show/hide button.

To improve upon my solution, you could try making the show/hide button change dynamically. Based on your current knowledge of JS for displaying and hiding text, you might be able to implement this feature easily.

Answer 10

http://jsfiddle.net/Bq6eK/215/

Instead of adjusting your code, I came up with my own solution. It may not be exactly what you were looking for, but perhaps you can use it as a starting point. I made sure to add comments to explain the changes I made.

To address the issue of not setting the height in JavaScript, I included 'maxHeight' as a parameter in the toggleHeight JS function. This way, it can be defined in the HTML for each expandable div.

I'll be honest, I'm not an expert in front-end languages, and there's a small glitch where the 'Show/hide' button needs to be clicked twice initially for the animation to begin. It could be a focus-related problem.

Another flaw in my solution is that the hidden text can be revealed by selecting and dragging within the div. You can copy and paste the hidden text to a visible area without clicking the show/hide button.

To improve upon my solution, you could try making the show/hide button change dynamically. Based on your current knowledge of JS for displaying and hiding text, you might be able to implement this feature easily.

Answer 11

Answer №6

If you're looking for a JS-free solution, consider using checkboxes instead. Check out this example.

To hide the checkbox, simply apply this CSS:

.container input{
    display: none;
}

You can then style it to resemble a button.

For the original source code that I customized, visit this link.

Answer 12

If you're looking for a JS-free solution, consider using checkboxes instead. Check out this example.

To hide the checkbox, simply apply this CSS:

.container input{
    display: none;
}

You can then style it to resemble a button.

For the original source code that I customized, visit this link.

Implement an expand/collapse effect using CSS3 transitions

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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