How to make various lists on H5 mobile terminal (5)
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《How to make various lists on H5 mobile terminal Production method (1)》
《How to make various lists on H5 mobile terminal (2)》
《How to make various lists on H5 mobile terminal (3)》
《 How to make various lists on H5 mobile terminal (4)》
If you saw this article first, I suggest you go to the link above first and read the corresponding content This way, the context is coherent and it is easier to understand the content of this article.
In Chapter 4, we learned how to make a double-column picture and text list. However, this picture and text list has There are certain limitations. The limitation is that the pictures must be square.
Of course, in the practice of actual projects, this is enough. However, this problem is still incomplete. For example, the pictures are not loaded. In the case of size, and ensure that the image cannot be deformed before loading.
Ordinary two-column image and text list (the image size is not limited, and the image is not deformed before loading)
There are still many such scenes. Let’s take a look at the actual renderings
Look at this effect. It’s not too complicated. But there are a few key points. .Let’s look at the html code first
html code
<!DOCTYPE html> <html lang="en"><head><meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" /> <title>list 3</title><link rel="stylesheet" href="../style/style.css"> </head> <body> <p class="list_3"> <ul> <li> <a href=""> <p class="goods_photo"> <img src="/static/imghwm/default1.png" data-src="../image/1.jpg" class="lazy" alt="这里是商品标题1"> </p> <h4 id="这里是商品标题">这里是商品标题1</h4> <em class="goods_price">¥4999.00</em> </a> </li> <li> <a href=""> <p class="goods_photo"> <img src="/static/imghwm/default1.png" data-src="../image/2.jpg" class="lazy" alt="这里是商品标题2"> </p> <h4 id="这里是商品标题">这里是商品标题2</h4> <em class="goods_price">¥4999.00</em> </a> </li> <li> <a href=""> <p class="goods_photo"> <img src="/static/imghwm/default1.png" data-src="../image/3.jpg" class="lazy" alt="这里是商品标题3"> </p> <h4 id="这里是商品标题">这里是商品标题3</h4> <em class="goods_price">¥4999.00</em> </a> </li> <li> <a href=""> <p class="goods_photo"> <img src="/static/imghwm/default1.png" data-src="../image/4.jpg" class="lazy" alt="这里是商品标题4"> </p> <h4 id="这里是商品标题">这里是商品标题4</h4> <em class="goods_price">¥4999.00</em> </a> </li> </ul></p></body></html>
The code in this example is different from the code in the previous article where all the pictures are square. As you can see, I am# The ##img tag adds a layer of
p nesting. This is of course not arbitrary. It is used to occupy the image and provide a parent box. In the CSS code, let's look at it again .
.list_3 { ul { @extend .cf; // 引用清理浮动代码片,看不懂请看本人scss相关教程
li { width: 50%;float: left;padding: 1rem 0;
outline: 1px solid #ddd; // 使用 outline 模拟边框 (outline不占据盒子模型)
background: #fff; // 使用白色背景颜色,防止 outline 重叠造成 2px 线条
a {
display: block;
text-decoration: none; // 去除默认下划线
}
.goods_title,.goods_price {
padding: 0 1rem; // 加上左右内填充,防止文字和边框粘结
text-align: center;
}
// 和上一章最大的差异在这里.
.goods_photo {
width: 100%;padding-bottom: 100%;position: relative;
img {
// 限制图片最大宽高,保持不变形
max-width: 80%;max-height: 80%;display: block;
// 未知宽高块级元素水平且垂直局中代码
position: absolute;top: 50%;left: 50%;
transform: translate(-50%, -50%);
}
}
}
}
}// 全站范围内用到的图文基本样式.goods_title,.goods_price {
display: block;position: relative;
@include ts(); // 引用文字描白边代码片
@include online(1.8rem); // 引用文字超出一行省略号代码片}
.goods_title {color:#000;font-size: 1.2rem;}
.goods_price {color:#f60;font-size: 1.5rem;font-weight: bold;}
Here, we add this code to the .goods_photo box
width: 100%;padding-bottom: 100 %;position: relative;, used to form a square box that changes with the width of the device. If you don't understand, you can refer to my previous blog post "Pure CSS to implement common layouts on mobile terminals - height and width" The Secret of Hooks".
1px border, etc. In this chapter, It mainly highlights the following knowledge points:
- How CSS implements the height and width hooks of elements.
- How CSS keeps images scaled down.
- How to implement horizontal and vertical centering of block-level elements of unknown size.
Emphasis: (1.) Android 4.4 or below and some domestic mobile browsers do not support the latest CSS attributes such as
clac\
vw\
vh. Therefore, the method in this article It is solved using techniques in traditional CSS.
(2.) In this series of articles, I plan to explain some of my experiences and insights on the mobile terminal step by step. Some people exclaimed after reading the first chapter, this is too simple. I would like to ask a question, almost any programming book It started from
hello world. Isn’t it all very simple?
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html5的div元素默认一行不可以放两个。div是一个块级元素,一个元素会独占一行,两个div默认无法在同一行显示;但可以通过给div元素添加“display:inline;”样式,将其转为行内元素,就可以实现多个div在同一行显示了。

html5中列表和表格的区别:1、表格主要是用于显示数据的,而列表主要是用于给数据进行布局;2、表格是使用table标签配合tr、td、th等标签进行定义的,列表是利用li标签配合ol、ul等标签进行定义的。

固定方法:1、使用header标签定义文档头部内容,并添加“position:fixed;top:0;”样式让其固定不动;2、使用footer标签定义尾部内容,并添加“position: fixed;bottom: 0;”样式让其固定不动。

html5中不支持的标签有:1、acronym,用于定义首字母缩写,可用abbr替代;2、basefont,可利用css样式替代;3、applet,可用object替代;4、dir,定义目录列表,可用ul替代;5、big,定义大号文本等等。

HTML5中画布标签是“<canvas>”。canvas标签用于图形的绘制,它只是一个矩形的图形容器,绘制图形必须通过脚本(通常是JavaScript)来完成;开发者可利用多种js方法来在canvas中绘制路径、盒、圆、字符以及添加图像等。

html5废弃了dir列表标签。dir标签被用来定义目录列表,一般和li标签配合使用,在dir标签对中通过li标签来设置列表项,语法“<dir><li>列表项值</li>...</dir>”。HTML5已经不支持dir,可使用ul标签取代。

3种取消方法:1、给td元素添加“border:none”无边框样式即可,语法“td{border:none}”。2、给td元素添加“border:0”样式,语法“td{border:0;}”,将td边框的宽度设置为0即可。3、给td元素添加“border:transparent”样式,语法“td{border:transparent;}”,将td边框的颜色设置为透明即可。

因为html5不基于SGML(标准通用置标语言),不需要对DTD进行引用,但是需要doctype来规范浏览器的行为,也即按照正常的方式来运行,因此html5只需要写doctype即可。“!DOCTYPE”是一种标准通用标记语言的文档类型声明,用于告诉浏览器编写页面所用的标记的版本。


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