Article directory
1. HTML common tags
1. The h1-h6 title tags are decremented one by one, and each tag occupies a line.
2, <p>paragraph tag, word wrap</p>
3. Forcibly break newlines< br />
4, body content tag, head header, title page title content
5. html represents structure, css represents appearance, and JavaScript represents behavior
2. Text formatting tags
| semantics | Label | illustrate |
|---|---|---|
| bold | < strong>< /strong>或< b>< /b> | The first one is more semantically strong! |
| tilt | < en>< /en>或< i>< /i> | The first one is more semantically strong! |
| strikethrough | < del>< /del>或< s>< /s> | The first one is more semantically strong! |
| underscore | < ins>< /ins>或< u>< /u> | The first one is more semantically strong! |
3. <div> and <span> tags
Div and span have no semantics, they are a box for holding content
Features: div tags are used for layout, only one div can be placed on a line, a large box
The span tag is used for layout, there can be multiple spans on a line, small boxes
4. Image tags
<img> tags are used to define images in HTML pages
<img src="图像url" />
src is a required attribute of the <img> tag, it is used to specify the path and filename of the image file
alt replace text with text when the image cannot be displayed
<img src="img1.jpg" alt="不存在的图片"/>
title prompt text mouse over the image, prompt text
<img src="img.jpg" alt="不存在的图片" title="存在图片"/>
The picture needs to set the width width, height height, border thickness border
5. Image tags and paths
Relative path: The directory path established based on the location of the referenced file.
In simple terms, the position of the image relative to the HTML page
| Relative path classification | symbol | illustrate |
|---|---|---|
| same level path | The image file is at the same level as the HTML file<img src="img.jpg"/> |
|
| next level path | / | Image files are located one level below the HTML file<img src="images/img.jpg"> |
| upper level path | …/ | The image file is one level above the HTML file<img src="../img.jpg"> |
Absolute path: It refers to the absolute position in the directory, directly reaching the target position, usually the path starting from the drive letter.
6. Hyperlink tags (emphasis)
1. External links:
<a href="跳转目标" target="目标窗口的弹出方式">文本或图像</a>
<a href="http://www.qq.com" target="_blank">腾讯</a>
The way target opens the window The default value is _self the current window opens the page _blank the new window opens the page
2. Internal link: the mutual link between the internal pages of the website, just link the name of the internal page directly
<a href="img.html">首页</a>
3. Empty link: If the link target is not determined at that time
<a href="#">首页</a>
Download link: If the address in href is a file or a compressed package, the file will be downloaded
<a href="img.zip">下载文件</a>
The address link is in the form of a file.exe or a compressed package such as zip
5. Web page element links: various web page elements in the web page, such as text, images, tables, audio, video, etc., can add hyperlinks
<a href="http://www.baidu.com"><img src="img.jpg"/></a>
6. Anchor link: Click on the link to quickly locate a certain position on the page.
In the href attribute of the link text, set the attribute value to the form of #name,
<a href="#冠军">中国好声音第一季</a>
Contents of the first season
<h3 id="冠军"></h3>
7. Special characters
space character
Less than sign
<
greater than sign
>
