HTML-CSS: Zoom in zoom out animation

Last update on May 28 2022 07:25:34 (UTC/GMT +8 hours)

HTML-CSS : Exercise-45 with Solution

Using HTML, CSS creates a zoom in zoom out animation.

Use @keyframes to define a three-step animation. At the start (0%) and end (100%), the element is its original size (scale(1 ,1)). Halfway through (50%) it's scaled up to 1.5 times its original size (scale(1.5, 1.5)).
Use width and height to give the element a specific size.
Use animation to set the appropriate values for the element to make it animated.

HTML Code:

<!--License: https://bit.ly/3GjrtVF-->
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Using HTML, CSS creates a zoom in zoom out animation</title>
</head>
<body>
<div class="zoom-in-out-box">w3r</div>
</body>
</html>

CSS Code:

.zoom-in-out-box {
  margin: 24px;
  width: 50px;
  height: 50px;
  background: #f500cc;
  animation: zoom-in-zoom-out 1s ease infinite;
}

@keyframes zoom-in-zoom-out {
  0% {
    transform: scale(1, 1);
  }
  50% {
    transform: scale(1.5, 1.5);
  }
  100% {
    transform: scale(1, 1);
  }
}

HTML-CSS Editor:

See the Pen html-css-practical-exercises by w3resource (@w3resource) on CodePen.

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HTML-CSS: Tips of the Day

What is the difference between id and class in CSS, and when should I use them?

Example:

<div id="header_id" class="header_class">
Text
</div>

#header_id {font-color:#fff}
.header_class {font-color:#000}

(Note that CSS uses the prefix # for IDs and . for Classes.)

However color was an HTML 4.01 <font> tag attribute deprecated in HTML 5. In CSS there is no "font-color", the style is color so the above should read:

Example:

<div id="header_id" class="header_class">
Text
</div>

#header_id {color:#fff}
.header_class {color:#000}

The text would be white.

Ref: https://bit.ly/39Stv4P