display : block; justify-content: center; position: absolute;
时间: 2024-05-20 08:10:22 浏览: 11
这是CSS样式中的属性,它们的含义如下:
- `display: block;` 表示该元素将被显示为块级元素,即独占一行。
- `justify-content: center;` 表示该元素的子元素在主轴方向上居中对齐。
- `position: absolute;` 表示该元素将被设置为绝对定位,相对于最近的已定位的祖先元素进行定位。
这些属性通常用于布局和定位元素。
相关问题
.box_li:after { content: ''; display: block; height: 30px; width: 0.1px; position: absolute; bottom: -31px; background-color: #b5b5b5; left: 50%; background-color: black; .TC{ /*测试代码*/ width: 20px; height: 20px; position: absolute; background-color: red; border-radius: 20px; display: flex; justify-content: center; align-items: center; left: 43.5%; top: 110%; z-index: 3; } }
这段 CSS 代码定义了一个 `.box_li` 类的伪元素 `:after`,它是一个绝对定位的带有背景色的长方形,它的作用是在父元素 `.box_li` 底部添加一条水平线条。同时,这段代码还定义了 `.TC` 类,它是一个绝对定位的红色圆形元素,位于 `.box_li` 元素的下方中央位置。
回到你的问题,如果父组件 `.box_li` 定义了 `after` 属性,它不会对子组件 `.TC` 产生影响,因为 `.TC` 元素是通过绝对定位(`position: absolute`)来定位在 `.box_li` 元素内的。这意味着 `.TC` 元素的位置与 `.box_li` 元素的其他内容是分离的,不会受到 `:after` 伪元素的影响。
需要注意的是,如果 `.box_li` 定义的 `after` 伪元素具有太高的 `z-index` 值,它可能会遮盖 `.TC` 元素。但是,这取决于具体的布局和样式设置,如果你有更具体的问题或代码示例,可以给我更多信息,我可以为你提供更准确的答案。
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;
}
```