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CSS Properties: How to make an element move gradually down?

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Solution:

HTML Code:

<!DOCTYPE html><!-- Declares the document type and version of HTML -->
<html><!-- Begins the HTML document -->
<head><!-- Contains metadata and links to external resources -->
<title>How to make an element move gradually down</title><!-- Sets the title of the document -->
<style type="text/css"> /* Starts CSS styling */
div{ /* Selects all div elements */
  width: 120px; /* Sets the width of the div elements to 120 pixels */
  height: 120px; /* Sets the height of the div elements to 120 pixels */
  background: #CC63FF; /* Sets the background color of the div elements to #CC63FF (purple) */
  position :relative; /* Sets the positioning context of the div elements to their containing block */
  -webkit-animation: mymove 5s infinite; /* Applies the "mymove" animation to the div elements for WebKit browsers, with a duration of 5 seconds and infinite iteration */
  animation: mymove 5s infinite; /* Applies the "mymove" animation to the div elements, with a duration of 5 seconds and infinite iteration */
}
@keyframes mymove { /* Defines the keyframes for the "mymove" animation */
  0%   {top: 0px;} /* Specifies the starting position of the div elements at the top of the page */
  25%  {top: 200px;} /* Specifies the position of the div elements at 25% of the animation duration, moving them down by 200 pixels */
  75%  {top: 50px;} /* Specifies the position of the div elements at 75% of the animation duration, moving them up by 50 pixels */
  100% {top: 100px;} /* Specifies the final position of the div elements at the bottom of the page */
}
</style><!-- Ends CSS styling -->
</head>
<body>
<p><strong>w3resource Tutorial</strong></p><!-- Paragraph element with strong (bold) text -->
<div>@keyframe</div><!-- Div element with the text "@keyframe" -->
</body>
</html><!-- Ends the HTML document -->

Explanation:

  • This HTML document demonstrates how to use keyframe animations in CSS to make an element move gradually down and then up.
  • CSS comments are added to explain each section of the code.
  • The div selector sets the styling for all div elements, including their width, height, background color, positioning, and the animation applied to them.
  • The @keyframes rule defines the keyframes for the mymove animation, specifying different positions for the div elements at various points in the animation duration.
  • The animation moves the div element gradually down by 200 pixels at 25% of the animation duration, then up by 50 pixels at 75% of the duration, and finally settles at the bottom of the page.

Live Demo:

See the Pen keyframes-answer by w3resource (@w3resource) on CodePen.


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https://www.w3resource.com/html-css-exercise/css-properties/keyframes-answer.php