Function: Let the style of the element change slowly, often used with hover to enhance the interactive experience of the web page.
Property name: transition.
important point:
-
Transition needs: The default state and the hover state have different styles to have a transition effect.
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The transition attribute is added to the element itself that needs to be transitioned (whoever changes will add the transition attribute)
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The transition property is set in different states, and the effect is different
① Set to the default state, there is a transition effect when the mouse moves in and out
② Set the hover state, there is a transition effect when the mouse is moved in, and there is no transition effect when the mouse is moved out.
Case: Box width changed from 200px to 600px
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
/* 过渡配合hover使用, 谁变化谁加过渡属性 */
.box {
width: 200px;
height: 200px;
background-color: pink;
/* 宽度200, 悬停的时候宽度600,背景色也变化程红色 花费1秒钟 */
/* transition: width 1s, background-color 2s; */
/* 如果变化的属性多, 直接写all,表示所有 */
transition: all 1s;
}
.box:hover {
width: 600px;
background-color: red;
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>