W3。CSS 图像〔t1〕
W3。CSS 提供了一个单一的类来管理图像并使它们具有响应性。使图像具有响应性意味着它应该根据其父元素进行缩放。也就是说,图像的大小不应该溢出其父图像,并且将根据其父图像大小的变化而增长和缩小,而不会失去其纵横比,w3-image 也是如此。
示例:向 HTML 页面添加响应图像。
超文本标记语言
<!DOCTYPE html>
<html>
<head>
<!-- Adding W3.CSS file through external link -->
<link rel="stylesheet"
href="https://www.w3schools.com/w3css/4/w3.css">
</head>
<body>
<!-- w3-container is used to add 16px
padding to any HTML element. -->
<!-- w3-center is used to set the content
of the element to the center. -->
<div class="w3-container w3-center">
<!-- w3-text-green sets the text color
to green. -->
<!-- w3-xxlarge sets font size to 32px. -->
<h2 class="w3-text-green w3-xxlarge">
Welcome To GFG
</h2>
</div>
<!-- Adding a responsive image at the
center of the page -->
<div class="w3-container w3-center">
<img class="w3-image" src="gfg.png">
</div>
</body>
</html>
输出:
虽然它只有一个类,但它可以与其他类结合,制作各种效果,如圆边图像、带边框图像、卡片图像等。要添加圆边图像,可以使用 w3-round 或任何其他类似的类。
示例:在 HTML 页面上添加圆边图像。
超文本标记语言
<!DOCTYPE html>
<html>
<head>
<!-- Adding W3.CSS file through external link -->
<link rel="stylesheet"
href="https://www.w3schools.com/w3css/4/w3.css">
</head>
<body>
<!-- w3-container is used to add 16px
padding to any HTML element. -->
<!-- w3-center is used to set the content
of the element to the center. -->
<div class="w3-container w3-center">
<!-- w3-text-green sets the text color to green. -->
<!-- w3-xxlarge sets font size to 32px. -->
<h2 class="w3-text-green w3-xxlarge">
Welcome To GFG
</h2>
</div>
<!-- Adding a round-edged responsive image at
the center of the page -->
<div class="w3-container w3-center">
<img class="w3-image w3-round-large" src="gfg.png">
</div>
</body>
</html>
输出:
您也可以使用 w3-circle 类向图像添加圆形图像。
示例:
超文本标记语言
<!DOCTYPE html>
<html>
<head>
<!-- Adding W3.CSS file through external link -->
<link rel="stylesheet"
href="https://www.w3schools.com/w3css/4/w3.css">
</head>
<body>
<!-- w3-container is used to add 16px
padding to any HTML element. -->
<!-- w3-center is used to set the content
of the element to the center. -->
<div class="w3-container w3-center">
<!-- w3-text-green sets the text color to green -->
<!-- w3-xxlarge sets font size to 32px. -->
<h2 class="w3-text-green w3-xxlarge">
Welcome To GFG
</h2>
</div>
<!-- Adding a circular responsive image at
the center of the page -->
<div class="w3-container w3-center">
<img class="w3-image w3-circle" src="gfg.png">
</div>
</body>
</html>
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