Peilin
4
Q:

hover transition css

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.btn {
  background-color: #f4511e;
  border: none;
  color: white;
  padding: 16px 32px;
  text-align: center;
  font-size: 16px;
  margin: 4px 2px;
  opacity: 0.6;
  transition: 0.3s;
}

.btn:hover {opacity: 1}
</style>
</head>
<body>

<h2>Fading Buttons - "Fade in Effect"</h2>

<button class="btn">Hover Over Me</button>

</body>
</html>
0
CSS Transitions
CSS transitions allows you to change property values smoothly, over a given duration.

In this chapter you will learn about the following properties:

transition
transition-delay
transition-duration
transition-property
transition-timing-function

To create a transition effect, you must specify two things:

the CSS property you want to add an effect to
the duration of the effect
Note: If the duration part is not specified, the transition will have no effect, because the default value is 0.

The following example shows a 100px * 100px red <div> element. The <div> element has also specified a transition effect for the width property, with a duration of 2 seconds:

Example
div {
  width: 100px;
  height: 100px;
  background: red;
  transition: width 2s;
}

The transition effect will start when the specified CSS property (width) changes value.

Now, let us specify a new value for the width property when a user mouses over the <div> element:

Example
div:hover {
  width: 300px;
}
Notice that when the cursor mouses out of the element, it will gradually change back to its original style.

Change Several Property Values
The following example adds a transition effect for both the width and height property, with a duration of 2 seconds for the width and 4 seconds for the height:

Example
div {
  transition: width 2s, height 4s;
}
6
/* Simple CSS color transition effect on selector */

div {
	color: white;
  	background-color: black; 
}

div:hover {
	background-color: red;
}


/* Additional transition effects on selector */

div {
	background-color: black;
  	color: white;
  	height: 100px;
  	transition: width 1.5s, height 3s;
  	width: 100px;
  	
}

div:hover {
	background-color: red;
  	height: 300px;	
  	width: 150px;
}
  
0
Read this comprehensive article about CSS animation transform property. 
It also has many useful examples that help you in best way.

https://medium.com/swlh/learn-css-transform-animation-zero-to-hero-6a2a643bd56b
2

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