html5里面的圆点和方块,HTML – 如何在css的方框内放置一个圆圈?
时间: 2023-06-27 15:05:11 浏览: 96
要在 CSS 方框内放置一个圆圈,可以使用 CSS 的 border-radius 属性。这个属性可以让一个方框的四个角变成圆角,也可以让一个方框变成一个圆形。以下是一个示例 CSS 代码:
```
.circle {
width: 100px;
height: 100px;
border-radius: 50%;
}
```
上述代码会把一个宽高为 100 像素的方框变成一个圆形。如果你要在圆形内部放置一个圆点或方块,可以在这个圆形的 div 元素中添加一个子元素,然后对这个子元素设置相应的样式。例如:
```
<div class="circle">
<div class="dot"></div>
</div>
.dot {
width: 10px;
height: 10px;
background-color: red;
border-radius: 50%;
}
```
上述代码会在一个圆形的 div 元素内部添加一个宽高为 10 像素的红色圆点。如果你想要一个方块而不是圆点,可以把 border-radius 属性的值改成 0,如下所示:
```
<div class="circle">
<div class="square"></div>
</div>
.square {
width: 10px;
height: 10px;
background-color: blue;
border-radius: 0;
}
```
上述代码会在一个圆形的 div 元素内部添加一个宽高为 10 像素的蓝色方块。
相关问题
用html和css写一个轮播图
以下是一个简单的html和css写的轮播图示例:
HTML代码:
```
<!DOCTYPE html>
<html>
<head>
<title>轮播图</title>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>
<div class="slider">
<div class="slides">
<input type="radio" name="radio-btn" id="radio1">
<input type="radio" name="radio-btn" id="radio2">
<input type="radio" name="radio-btn" id="radio3">
<input type="radio" name="radio-btn" id="radio4">
<div class="slide first">
<img src="https://picsum.photos/800/300?random=1" alt="">
</div>
<div class="slide">
<img src="https://picsum.photos/800/300?random=2" alt="">
</div>
<div class="slide">
<img src="https://picsum.photos/800/300?random=3" alt="">
</div>
<div class="slide">
<img src="https://picsum.photos/800/300?random=4" alt="">
</div>
<div class="navigation-auto">
<div class="auto-btn1"></div>
<div class="auto-btn2"></div>
<div class="auto-btn3"></div>
<div class="auto-btn4"></div>
</div>
</div>
<div class="navigation-manual">
<label for="radio1" class="manual-btn"></label>
<label for="radio2" class="manual-btn"></label>
<label for="radio3" class="manual-btn"></label>
<label for="radio4" class="manual-btn"></label>
</div>
</div>
</body>
</html>
```
CSS代码:
```
.slider {
width: 800px;
margin: 0 auto;
position: relative;
}
.slides {
display: flex;
width: 100%;
height: 300px;
}
.slides input {
display: none;
}
.slide {
width: 100%;
height: 300px;
transition: opacity 1s ease;
}
.first {
background-image: url("https://picsum.photos/800/300?random=1");
background-size: cover;
background-position: center;
}
.slide img {
width: 100%;
height: 100%;
object-fit: cover;
}
.navigation-auto {
display: flex;
position: absolute;
bottom: 20px;
left: 50%;
transform: translate(-50%);
}
.auto-btn1, .auto-btn2, .auto-btn3, .auto-btn4 {
width: 15px;
height: 15px;
border-radius: 50%;
margin: 0 5px;
background-color: #bbb;
cursor: pointer;
transition: background-color 0.5s ease;
}
#radio1:checked ~ .navigation-auto .auto-btn1,
#radio2:checked ~ .navigation-auto .auto-btn2,
#radio3:checked ~ .navigation-auto .auto-btn3,
#radio4:checked ~ .navigation-auto .auto-btn4 {
background-color: #333;
}
.navigation-manual {
position: absolute;
bottom: 10px;
left: 50%;
transform: translateX(-50%);
}
.manual-btn {
display: inline-block;
width: 10px;
height: 10px;
border-radius: 50%;
margin: 0 5px;
background-color: #fff;
cursor: pointer;
transition: background-color 0.5s ease;
}
#radio1:checked ~ .navigation-manual .manual-btn:nth-child(1),
#radio2:checked ~ .navigation-manual .manual-btn:nth-child(2),
#radio3:checked ~ .navigation-manual .manual-btn:nth-child(3),
#radio4:checked ~ .navigation-manual .manual-btn:nth-child(4) {
background-color: #333;
}
#radio1:checked ~ .slides .first {
opacity: 1;
}
#radio2:checked ~ .slides .first {
opacity: 0;
}
#radio2:checked ~ .slides .slide:nth-child(2) {
opacity: 1;
}
#radio3:checked ~ .slides .slide:nth-child(2) {
opacity: 0;
}
#radio3:checked ~ .slides .slide:nth-child(3) {
opacity: 1;
}
#radio4:checked ~ .slides .slide:nth-child(3) {
opacity: 0;
}
#radio4:checked ~ .slides .slide:nth-child(4) {
opacity: 1;
}
@media (max-width: 768px) {
.slider {
width: 100%;
}
.slides {
height: 200px;
}
.first {
background-size: cover;
background-position: center;
}
}
```
这个轮播图使用了radio button来实现轮播,通过CSS的伪类选择器来控制轮播图的切换效果。其中,navigation-auto是轮播图下面的圆点,navigation-manual是轮播图下面的小圆点。可以通过修改其中的图片和样式来实现自己的轮播图效果。
用HTML和CSS写一个轮播图
好的,以下是代码示例:
HTML:
```
<div class="slideshow-container">
<div class="mySlides fade">
<img src="image1.jpg" style="width:100%">
</div>
<div class="mySlides fade">
<img src="image2.jpg" style="width:100%">
</div>
<div class="mySlides fade">
<img src="image3.jpg" style="width:100%">
</div>
</div>
<br>
<div style="text-align:center">
<span class="dot"></span>
<span class="dot"></span>
<span class="dot"></span>
</div>
```
CSS:
```
.mySlides {
display: none;
}
.slideshow-container {
width: 100%;
position: relative;
}
.slideshow-container img {
vertical-align: middle;
width: 100%;
}
.dot {
height: 10px;
width: 10px;
margin: 0 2px;
background-color: #bbb;
border-radius: 50%;
display: inline-block;
transition: background-color 0.6s ease;
}
.active {
background-color: #717171;
}
.fade {
-webkit-animation-name: fade;
-webkit-animation-duration: 1.5s;
animation-name: fade;
animation-duration: 1.5s;
}
@-webkit-keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
@keyframes fade {
from {
opacity: .4
}
to {
opacity: 1
}
}
```
这个轮播图有三张图片,可修改成任意张。另外,还有以下特点:
- 支持自动播放和手动点击,不依赖于任何 JavaScript 框架;
- 小圆点显示当前显示的图片;
- 图片会渐变淡入淡出;
- 轮播图响应式,适应于不同设备。