Method: 1. Use the animation attribute to bind animation to the div element; 2. Use the "@keyframes" rule to control the animation action to achieve a gradual effect. The syntax is "@keyframes animation name {0%{opacity: 0}100%{opacity:1}}".
The operating environment of this tutorial: Windows 10 system, CSS3&&HTML5 version, Dell G3 computer.
How to make div gradually appear in css
In css, you can use animation attributes and @keyframes rules to realize the reality and hiding of elements Animation effects, through the @keyframes rule, you can create animations.
The principle of creating animation is to gradually change one set of CSS styles into another set of styles. You can change this set of CSS styles multiple times during the animation.
Specify the time when the change occurs as a percentage, or through the keywords "from" and "to", which are equivalent to 0% and 100%. 0% is the start time of the animation, 100% is the end time of the animation. For best browser support, you should always define 0% and 100% selectors.
The syntax is:
@keyframes animationname {keyframes-selector {css-styles;}}where
The syntax of the animation attribute is:
animation: name duration timing-function delay iteration-count direction;
where:
The example is as follows:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>css3显示隐藏效果</title>
<style>
.fadenum{
background-color: #ffce44;
width: 150px;
height: 150px;
animation:fadenum 5s 1;
}
@keyframes fadenum{
0%{opacity: 0;}
100%{opacity: 1;}
}
</style>
</head>
<body>
<div class="fadenum"></div>
</body>
</html>Output result:
(Learning video sharing: css video tutorial)
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