background-image:repeating-radial-gradient的用法
时间: 2023-05-20 13:06:59 浏览: 128
background-image: repeating-radial-gradient() 是 CSS3 中的一个属性,用于创建重复的径向渐变背景图像。它可以接受多个参数,包括渐变的起始点、颜色和大小等。例如,以下代码可以创建一个重复的径向渐变背景图像:
background-image: repeating-radial-gradient(circle, #ff0000, #00ff00 10%, #0000ff 20%);
这将创建一个以圆形为起始点的径向渐变,从红色渐变到绿色,然后到蓝色,每隔20%的距离重复一次。
相关问题
单选题(80分) 55、(1分)下列选项中,用于设置CSS3中的线性渐变的选项为() A、background-image:repeating-linear-gradient(参数值) OB、background-image:radial-gradient(参数值) OC、background-image:linear-gradient(参数值) OD、background-image:repeating-radial-gradient(参数值)
在CSS3中,用于设置线性渐变的选项是 `background-image:linear-gradient(参数值)`,选项C是正确的。线性渐变是指在两个或多个颜色之间创建一个渐变,该渐变沿着一条直线进行。可以使用 `linear-gradient` 函数来定义线性渐变。该函数接受一组颜色和位置值,以指定颜色停止的位置。例如,下面的代码将在一个元素的背景上创建一个从上到下的红色到黄色的线性渐变:
```css
background-image: linear-gradient(red, yellow);
```
在上面的代码中,`linear-gradient` 函数使用了两个颜色值 `red` 和 `yellow`,表示渐变从红色到黄色。可以使用其他参数来定义不同的渐变方向、颜色站点和颜色停止位置。
优化下面代码.bg { width: 100%; height: 100vh; background-image: url('../../assets/img/info-bg.png'); background-size: 100% 100%; background-repeat: no-repeat; position: relative; font-family: AlibabaPuHuiTiR; .goBack { position: absolute; top: 34px; right: 65px; cursor: pointer; color: #ffffff; width: 181px; padding: 15px 10px; background: rgba(24, 31, 30, 0.52); border: 1px solid #4a524e; border-radius: 5px; font-size: 18px; font-family: AlibabaPuHuiTiR; z-index: 111; display: flex; flex-direction: row; justify-content: space-between; align-items: center; } .home-left { position: absolute; top: 18%; left: 40px; width: 41%; height: 76%; font-size: 24px; color: #ffffff; } .unit { font-size: 24px; color: #636363; } .home-left-title { font-size: 24px; color: #ffffff; line-height: 36px; } .home-right { position: absolute; top: 18%; right: 88px; width: 46%; height: 78%; } .model { display: flex; justify-content: center; align-items: center; height: 90%; } #threeContained { width: 100%; height: 100%; } .model-qk-img { width: 82%; height: 90%; background-image: url('../../assets/img/howo.png'); background-size: 100% 100%; background-repeat: no-repeat; } .model-zk-img { width: 56%; height: 90%; background-image: url('../../assets/img/heavyT.png'); background-size: 100% 100%; background-repeat: no-repeat; } .model-gj-img { width: 82%; height: 90%; background-image: url('../../assets/img/transit.png'); background-size: 100% 100%; background-repeat: no-repeat; } .car-online { margin-bottom: 50px; } } .day-data { display: flex; flex-direction: row; justify-content: space-between; align-items: center; height: 29%; margin-left: 30px; } .day-val { width: 40%; } .prefix { display: inline-block; width: 6px; height: 14px; background: #ffffff; margin-right: 20px; } .zh-title { margin-left: 30px; padding-top: 30px; font-size: 30px; font-weight: 700; text-align: left; color: #ffffff; line-height: 32px; letter-spacing: 0.3px; font-family: AlibabaPuHuiTiB; } .en-title { margin-left: 30px; font-size: 14px; font-weight: 400; text-align: left; color: #ffffff; line-height: 32px; letter-spacing: -0.91px; font-family: AlibabaPuHuiTiR; }
Here are some suggestions to optimize the code:
1. Use shorthand properties whenever possible. For example, instead of writing `background-size: 100% 100%;`, you can write `background-size: cover;`.
2. Consolidate similar styles into classes, instead of repeating them for every element. For example, you can create a class for the font family and apply it to all elements that use that font.
3. Remove unnecessary styles that are not being used or overwritten by other styles.
4. Use more specific selectors to target elements, instead of relying on the order of elements in the HTML. This will make the code more robust and easier to maintain.
5. Consider using a CSS preprocessor like Sass or Less, which can help you write cleaner and more organized code.
Here's an example of how the code could be optimized:
```
.bg {
width: 100%;
height: 100vh;
background: url('../../assets/img/info-bg.png') no-repeat center center / cover;
position: relative;
font-family: AlibabaPuHuiTiR;
}
.goBack {
position: absolute;
top: 34px;
right: 65px;
cursor: pointer;
color: #fff;
width: 181px;
padding: 15px 10px;
background: rgba(24, 31, 30, 0.52);
border: 1px solid #4a524e;
border-radius: 5px;
font-size: 18px;
font-family: AlibabaPuHuiTiR;
z-index: 111;
display: flex;
flex-direction: row;
justify-content: space-between;
align-items: center;
}
.home-left {
position: absolute;
top: 18%;
left: 40px;
width: 41%;
height: 76%;
font-size: 24px;
color: #fff;
}
.unit {
font-size: 24px;
color: #636363;
}
.home-left-title {
font-size: 24px;
color: #fff;
line-height: 36px;
}
.home-right {
position: absolute;
top: 18%;
right: 88px;
width: 46%;
height: 78%;
}
.model {
display: flex;
justify-content: center;
align-items: center;
height: 90%;
}
#threeContained {
width: 100%;
height: 100%;
}
.model-qk-img {
width: 82%;
height: 90%;
background: url('../../assets/img/howo.png') no-repeat center center / cover;
}
.model-zk-img {
width: 56%;
height: 90%;
background: url('../../assets/img/heavyT.png') no-repeat center center / cover;
}
.model-gj-img {
width: 82%;
height: 90%;
background: url('../../assets/img/transit.png') no-repeat center center / cover;
}
.car-online {
margin-bottom: 50px;
}
.day-data {
display: flex;
justify-content: space-between;
align-items: center;
height: 29%;
margin-left: 30px;
}
.day-val {
width: 40%;
}
.prefix {
display: inline-block;
width: 6px;
height: 14px;
background: #fff;
margin-right: 20px;
}
.zh-title {
margin-left: 30px;
padding-top: 30px;
font-size: 30px;
font-weight: 700;
text-align: left;
color: #fff;
line-height: 32px;
letter-spacing: 0.3px;
font-family: AlibabaPuHuiTiB;
}
.en-title {
margin-left: 30px;
font-size: 14px;
font-weight: 400;
text-align: left;
color: #fff;
line-height: 32px;
letter-spacing: -0.91px;
font-family: AlibabaPuHuiTiR;
}
.font-alibaba {
font-family: AlibabaPuHuiTiR;
}
.font-alibaba-bold {
font-family: AlibabaPuHuiTiB;
}
```
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