bg-color color opacity background-color Submit Answer » See all CSS Exercises CSS Quiz Test your CSS skills with a quiz. My Learning Track your progress with the free "My Learning" program here at W3Schools. Log in to your account, and start earning points!
🌎 Slickr A tool for designing cover image for your blog. 🌎 Shadow Palette Generator Create a set of lush, realistic CSS shadows. 🌎 Ray.so Online tool to create beautiful images of your code. 🌎 Codepng Convert your source code into awesome shareable images. 🌎 CSS Grid Generator...
Emmet写法:代码的简写方式,输入缩写 VS Code 会自动生成对应的代码。 • HTML • CSS:大多数简写方式为属性单词的首字母 例如: div.red{这是div标签} 可生成: <div class="red">这是 div 标签</div> 背景属性 网页中,使用背景图实现装饰性的图片效果。 属性名:background-image(bgi) 属性值:url(背景...
The CSS background properties are used to add background effects for elements. In these chapters, you will learn about the following CSS background properties: background-color background-image background-repeat background-attachment background-position ...
( min-device-pixel-ratio: 2), only screen and ( min-resolution: 192dpi), only screen and ( min-resolution: 2dppx) { background-image: url("@{file-2x}"); background-size: @width-1x @height-1x; } } // Usage .jumbotron { .img-retina("/img/bg-1x.png", "/img/bg-2x.png...
-ms-filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='bg.jpg', sizingMethod='scale')"; 这个用滤镜来兼容的写法并不是很完美,首先是图片路径,这里只能是相对于根目录的路径,或者用绝对路径;然后是图片纵横比改变了,是拉伸铺满的形式。尽管如此,总比留空白好多了吧(如果背景图bg.jpg的宽高够...
The property’s value is given as a comma-separated list of <bg-image> values where <bg-image> = <image> | none A value of none counts as a background image layer but draws nothing. An image that is empty (zero width or zero height), that fails to download, or that cannot be ...
background-image: 背景图片 Background-repeat:repeat(默认)|no-repeat|repeat-x|repeat-y 背景平铺 Background-position: left|right|center(默认)|top|bottom 背景定位 Background-attachment 背景是否滚动 scroll(默认)|fixed Background-position background-position: right;// 方位值只写一个的时候,另外一个值...
Codepen demo 这种方式虽然简单但有个明显的缺陷,不支持设置border-radius。接下来会介绍几种支持border-radius的方法。 2. 使用background-image 使用background-image绘制渐变色背景,并且把中间用纯色遮住应该是最容易想到的一种方法,思路是:使用两个盒子叠加,给下层的盒子设置渐变色背景和 padding,给上层盒子设置纯色...
( min-device-pixel-ratio: 2), only screen and ( min-resolution: 192dpi), only screen and ( min-resolution: 2dppx) { background-image: url("@{file-2x}"); background-size: @width-1x @height-1x; } } // Usage .jumbotron { .img-retina("/img/bg-1x.png", "/img/bg-2x.png...