What is the method for adjusting the fade OUT speed of Bootstrap tabs?

Looking to adjust the speed of a fade effect in Bootstrap, I came across this solution involving CSS:

@import url('https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css');

.fade {
   opacity: 0;
   -webkit-transition: opacity 1.5s linear;
      -moz-transition: opacity 1.5s linear;
       -ms-transition: opacity 1.5s linear;
        -o-transition: opacity 1.5s linear;
           transition: opacity 1.5s linear;
 }
<div class="btn-group" role="group">
  <button class="btn active" data-toggle="tab" href="#one">One</button>
  <button class="btn" data-toggle="tab" href="#two">Two</button>
  <button class="btn" data-toggle="tab" href="#three">Three</button>
</div>
<div class="tab-content">
  <div id="one" class="tab-pane fade in active">This is the One</div>
  <div id="two" class="tab-pane fade">This is the Two</div>
  <div id="three" class="tab-pane fade">This is the Three</div>
</div>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

However, this code only affects the fade-in time, leaving the fade-out unaffected. Any alternative solutions to address this issue?

javascriptjqueryhtmlcsstwitter-bootstrap

Answer №1

Instead of having a fade-out effect, the element's visibility is simply altered by removing a specific class.

If you want to implement a fade-out transition, ensure that the item remains in the DOM (HTML document) but becomes invisible to allow for a smooth fade animation.

Take a look at this customized example:

@import url('https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css');

.tab-content {
  position:relative;
}

.tab-content>.tab-pane {
  /* To maintain proper positioning of elements, use position:absolute; */
  position:absolute;
  top:0;
}

.fade {
   opacity: 0;
   -webkit-transition: opacity 1.5s linear;
      -moz-transition: opacity 1.5s linear;
       -ms-transition: opacity 1.5s linear;
        -o-transition: opacity 1.5s linear;
           transition: opacity 1.5s linear;
 }

.tab-content>.tab-pane:not(.in) { 
  /* Default behavior is display:none;, change it to display:block; */
  display:block; 
  /* Set opacity to 0 for the transition effect */
  opacity:0;
}
<div class="btn-group" role="group">
  <button class="btn active" data-toggle="tab" href="#one">One</button>
  <button class="btn" data-toggle="tab" href="#two">Two</button>
  <button class="btn" data-toggle="tab" href="#three">Three</button>
</div>
<div class="tab-content">
  <div id="one" class="tab-pane fade in active">This is the One</div>
  <div id="two" class="tab-pane fade">This is the Two</div>
  <div id="three" class="tab-pane fade">This is the Three</div>
</div>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"></script>

Answer №2

One problem arises when an item is inactive, as its display property is set to display:none, causing it to be hidden before any animation can take effect. By positioning everything using absolute positioning to overlap, you can keep the display as display:block and simply adjust the opacity:

@import url('https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css');

.fade {
   opacity: 0;
   -webkit-transition: opacity 1.5s linear;
      -moz-transition: opacity 1.5s linear;
       -ms-transition: opacity 1.5s linear;
        -o-transition: opacity 1.5s linear;
           transition: opacity 1.5s linear;
 }
.tab-content {
    position:relative;
}
.tab-content>.tab-pane {
   top: 0;
   position:absolute;
   display:block;
 }
.tab-content>.tab-pane:not(.active) {
    opacity: 0;
 }
<div class="btn-group" role="group">
  <button class="btn active" data-toggle="tab" href="#one">One</button>
  <button class="btn" data-toggle="tab" href="#two">Two</button>
  <button class="btn" data-toggle="tab" href="#three">Three</button>
</div>
<div class="tab-content">
  <div id="one" class="tab-pane fade in active">This is the One</div>
  <div id="two" class="tab-pane fade">This is the Two</div>
  <div id="three" class="tab-pane fade">This is the Three</div>
</div>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

Answer №3

To eliminate the fade effect or speed up the appearance of tabs, simply remove the fade class.

// Original

<div class="tab-content">
  <div id="one" class="tab-pane fade in active">This is the One</div>
  <div id="two" class="tab-pane fade">This is the Two</div>
  <div id="three" class="tab-pane fade">This is the Three</div>
</div>

// Updated

<div class="tab-content">
  <div id="one" class="tab-pane in active">This is the One</div>
  <div id="two" class="tab-pane fade">This is the Two</div>
  <div id="three" class="tab-pane fade">This is the Three</div>
</div>

The fade class only applies to the initial pane; once a button is clicked, jQuery removes the active and fade classes and applies them to the appropriate pane accordingly.

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