Ways to smoothly conclude a loading animation in real-time

Question

Ways to smoothly conclude a loading animation in real-time

I have a unique challenge of creating a loading animation using Adobe After Effects instead of CSS. The main goal is to develop an animation that continuously loops, but when the loading process stops, it ends with a distinct finishing touch. For instance, if a circle is spinning around and animation.stop() is triggered, the circle should spin rapidly and shrink until it disappears, providing a dynamic ending to the animation. How can this be achieved?

One idea is to create two separate animations - the looping animation and the end animation. When animation.stop() is called, the end animation can be queued up to smoothly transition from the looped animation to the final sequence. Is this approach viable? And how can animations be queued in HTML/Javascript?

Simply stopping or hiding the looping animation and starting the end animation abruptly is not sufficient, as the loop animation must complete its cycle for a seamless transition. Considering that my actual loop animation is more intricate than just a spinning circle, it's essential to ensure a smooth transition between the loop and end animations.

javascript loops animation loading after-effects

Answer 1

Answer №1

When it comes to handling animations in JavaScript, I have encountered a similar challenge before. Due to the limitations of pure JavaScript, you may need to create two separate animations and export them as animated GIFs. Using videos or advanced graphics can be quite heavy and cumbersome.

The key here is to manage both animations simultaneously but display only one at a time based on specific triggers. Both animations should share similar properties like dimensions and positions.

During the loading process, show the looping animation while hiding the end animation. Once the loading completes, switch to displaying the end animation and gradually fade it out as it reaches its end using setTimeout or setInterval functions in JavaScript.

In jQuery, you can achieve this by having two div elements containing the GIF images positioned on the page accordingly.

// loopDiv - loop_animation.gif
<div id="loopDiv"><img src="images/animations/loop_animation.gif"/></div>
        
// endDiv - end_animation.gif (6 seconds duration)
<div id="endDiv"><img src="/images/animations/end_animation.gif"/></div>

// Progress indication during loading

var endt = 20000; // 20 seconds (20 * 1000 milliseconds)

function doProgress(){
   clearInterval(endt); // Ensure interval is cleared before starting
   $('#loopDiv').show();
   $('#endDiv').hide();
}

function endProgress(){
   $('#loopDiv').hide();
   $('#endDiv').show();
   setInterval(function(){
       $('#endDiv').hide();
    }, endt); // Hide the endDiv after 20 seconds
}

If implemented correctly, this approach should work for your needs. For more sophisticated solutions, consider utilizing the CreateJs - EaselJs library along with the canvas API to create complex animations with event interactions.

I trust that this explanation adequately addresses your question. Cheers!

Answer 2

When it comes to handling animations in JavaScript, I have encountered a similar challenge before. Due to the limitations of pure JavaScript, you may need to create two separate animations and export them as animated GIFs. Using videos or advanced graphics can be quite heavy and cumbersome.

The key here is to manage both animations simultaneously but display only one at a time based on specific triggers. Both animations should share similar properties like dimensions and positions.

During the loading process, show the looping animation while hiding the end animation. Once the loading completes, switch to displaying the end animation and gradually fade it out as it reaches its end using setTimeout or setInterval functions in JavaScript.

In jQuery, you can achieve this by having two div elements containing the GIF images positioned on the page accordingly.

// loopDiv - loop_animation.gif
<div id="loopDiv"><img src="images/animations/loop_animation.gif"/></div>
        
// endDiv - end_animation.gif (6 seconds duration)
<div id="endDiv"><img src="/images/animations/end_animation.gif"/></div>

// Progress indication during loading

var endt = 20000; // 20 seconds (20 * 1000 milliseconds)

function doProgress(){
   clearInterval(endt); // Ensure interval is cleared before starting
   $('#loopDiv').show();
   $('#endDiv').hide();
}

function endProgress(){
   $('#loopDiv').hide();
   $('#endDiv').show();
   setInterval(function(){
       $('#endDiv').hide();
    }, endt); // Hide the endDiv after 20 seconds
}

If implemented correctly, this approach should work for your needs. For more sophisticated solutions, consider utilizing the CreateJs - EaselJs library along with the canvas API to create complex animations with event interactions.

I trust that this explanation adequately addresses your question. Cheers!

Answer 3

Answer №2

Here is a straightforward example that uses only JavaScript and CSS, no libraries involved.

function adjustAnimation() {
   var element = document.getElementById("example-animation");
 
   element.classList.remove('example-animation-slow');
   element.classList.add('example-animation-fast', 'example-animation-scaleout');
}

.example-animation {
  position: fixed;
  z-index: 9999;
  height: 60px;
  width: 60px;
  overflow: show;
  margin: auto;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  font: 0/0 a;
  color: transparent;
  text-shadow: none;  
  background-color: transparent;
  border: 0;
 /* visibility: hidden; */
}

/* Transparent Overlay */
.example-overlay {
  content: '';
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.3);
}

.example-animation:after {
  height: 50px;
  width: 50px;
  margin-left: -25px;

  content: '';
  display: block;

  border-left: 6px solid rgba(60, 167, 115, .15);
  border-right: 6px solid rgba(60, 167, 115, .15);
  border-bottom: 6px solid rgba(60, 167, 115, .15);
  border-top: 6px solid rgba(60, 167, 115, .8);
  border-radius: 100%;
}

.example-animation-slow:after {
  animation: rotateMotion 1200ms infinite linear;  
}


.example-animation-fast:after {
  animation: rotateMotion 300ms infinite linear;  
}

.example-animation-scaleout {
  transform: scale(0);
  animation: scaleOut 1000ms ease-in;  
}
 

/* Animation */
@keyframes rotateMotion {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(359deg);
  }
}


@keyframes scaleOut {
  0% {
    transform: scale(1);
  }
  100% {
    transform: scale(0);
  }
}

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Simple Example</title>
</head>
<body>
    
  <div class="example-overlay" onclick="adjustAnimation()">
    
      <div id="example-animation"         
      class="example-animation example-animation-slow"></div>
    
    </div>
   
</body>
</html>

In essence, the class is modified to enhance the animation speed and add a scaling effect. Click on the output section to initiate the scaleout animation.

Answer 4

Here is a straightforward example that uses only JavaScript and CSS, no libraries involved.

function adjustAnimation() {
   var element = document.getElementById("example-animation");
 
   element.classList.remove('example-animation-slow');
   element.classList.add('example-animation-fast', 'example-animation-scaleout');
}

.example-animation {
  position: fixed;
  z-index: 9999;
  height: 60px;
  width: 60px;
  overflow: show;
  margin: auto;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  font: 0/0 a;
  color: transparent;
  text-shadow: none;  
  background-color: transparent;
  border: 0;
 /* visibility: hidden; */
}

/* Transparent Overlay */
.example-overlay {
  content: '';
  display: block;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0,0,0,0.3);
}

.example-animation:after {
  height: 50px;
  width: 50px;
  margin-left: -25px;

  content: '';
  display: block;

  border-left: 6px solid rgba(60, 167, 115, .15);
  border-right: 6px solid rgba(60, 167, 115, .15);
  border-bottom: 6px solid rgba(60, 167, 115, .15);
  border-top: 6px solid rgba(60, 167, 115, .8);
  border-radius: 100%;
}

.example-animation-slow:after {
  animation: rotateMotion 1200ms infinite linear;  
}


.example-animation-fast:after {
  animation: rotateMotion 300ms infinite linear;  
}

.example-animation-scaleout {
  transform: scale(0);
  animation: scaleOut 1000ms ease-in;  
}
 

/* Animation */
@keyframes rotateMotion {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(359deg);
  }
}


@keyframes scaleOut {
  0% {
    transform: scale(1);
  }
  100% {
    transform: scale(0);
  }
}

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Simple Example</title>
</head>
<body>
    
  <div class="example-overlay" onclick="adjustAnimation()">
    
      <div id="example-animation"         
      class="example-animation example-animation-slow"></div>
    
    </div>
   
</body>
</html>

In essence, the class is modified to enhance the animation speed and add a scaling effect. Click on the output section to initiate the scaleout animation.

Ways to smoothly conclude a loading animation in real-time

Answer №1

Answer №2

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