Web front end -- HTML

Hee hee hee hee hee 2020-11-13 01:57:49
web end html


One 、Web Introduction to front end development

Web summary

 Insert picture description here

Web origin

1984 Tim Berners Lee created the world's first World Wide Web navigation site, the world's first website
 Insert picture description here

Web The characteristics and working principle of

1. Easy navigation and graphical interface
2. It's not about the platform
3. Distributed structure
4. dynamic
5. Interactivity
 Insert picture description here

URL Introduce

URL Unified resource locator can be understood as a web address .
The composition is as follows :
Protocol type :// Server address ( Port number )/ route / file name
Example :

Two 、HTML Web page structure

  • HTML(Hyper Text Mark-up Language ) It's hypertext markup language , A language that describes the structure and presentation of a page document by using tag tags , Then the browser will parse it , And then show the results on the web page .

  • Hypertext refers to hyperlinks
    A mark is a label

  • 1).HTML The file is opened with an editor to display the text , It can be written Ben's way of editing .

  • 2). HTML File open with browser , The browser will render the file as a web page according to the label description , The displayed page can be from a web page Links jump to another page .

HTML Basic structure

 Insert picture description here

HTML The document type

The two types of documents commonly used at present are xhtml 1.0 and html5
 Insert picture description here

HTML Document specification and annotation

xhtml The standard of document writing has been established ,html5 Can be partially complied with , You can also comply with all of them , Look at the development requirements .
1、 All labels have to be lowercase
2、 All attributes must be enclosed in double quotation marks
3、 All labels must be closed
4、img Must add alt attribute ( Description of the picture )

HTML notes

html Comments can be inserted into the document code , Comments are the explanation and explanation of the code , The content of the comment will not be displayed on the page ,html Insert comments into the code Approach is to :

<!-- This is a comment -->

3、 ... and 、HTML label

Text label

 Insert picture description here
 Insert picture description here

Line wrap label

 Insert picture description here

Tabs tab

 Insert picture description here

div And span label

 Insert picture description here
 Insert picture description here

Picture label

Tag definition HTML Images on the page . There are two required properties :src and alt.
attribute :src: Picture name and url Address title: Text prompt properties
alt: Tips for image loading failure width/height: Image width / Height

Hyperlink label

Hyperlink tags
attribute :
href: must , Refers to the link jump address ;
target: Indicates how the link is opened .
_blank New window ,
_self This window ( Default )
title: Text prompt properties

  • Anchor point
    Anchor link :
    1. Define an anchor point :
      use Baidu Search
    2. Use anchors :
    <a href="#a1"> Jump to the a1 It's about </a>
Tabular label

stay HTML In the document , Tables are widely used to store text and images on Web pages ; Insert picture description here

  • label :
    Tabular label :table
    Row labels :tr
    Cell ( Represents the concept of columns ):td
    Header :th : Bold and centered
    Table title :caption
    Label merging :
    merger :rowspan
    columns :colspan
  • Common attributes of label :
    border: Frame
    width: Width
    height: Height
    algin: Alignment mode
Form labels

Common properties :
action attribute : Target address for submission (URL)
method attribute : submission :get( Default ) and post
get The way :
URL The address bar can be seen
The length is limited
Relatively unsafe .
post The way :
URL The address is not visible
The length is unlimited
A relatively safe .

Form item labels

Form item labels input Define input fields , Users can enter data in it .
stay HTML 5 in ,type Attributes have a lot of new values .
 Insert picture description here

Drop down list label
<select>...</select> Tag create drop-down list .
name attribute : Definition name , Used to store drop-down values
size: Define the number of visible items in the menu ,html5 I won't support it
disabled When the attribute is true when , The menu will be disabled .
multiple multi-select
<option>... </option> Drop down selection tab , For embedding into <select> Used in the label ;
*value attribute : The value of the dropdown
*selected attribute : By default, drop-down the specified item .
Text field labels

… Multi line text input area
name : Definition name , Used to store values in the text area .
cols : Specifies the number of columns visible in the text area .
rows : Specifies the number of lines visible in the text area .
disabled: Whether to disable
readonly: read-only

Button label
<button>...</button> Label definition button .
<fieldset> --fieldset Element to group related elements in the form .

 Insert picture description here

html Embedded frame
<iframe> The tag is created to contain another html File inline framework ( That's the inside frame ),
src Property to define another html Reference address of the document
frameborder Property defines the border ,
scrolling Whether the property definition has a scroll bar ,
本文为[Hee hee hee hee hee]所创,转载请带上原文链接,感谢

  1. [front end -- JavaScript] knowledge point (IV) -- memory leakage in the project (I)
  2. This mechanism in JS
  3. Vue 3.0 source code learning 1 --- rendering process of components
  4. Learning the realization of canvas and simple drawing
  5. gin里获取http请求过来的参数
  6. vue3的新特性
  7. Get the parameters from HTTP request in gin
  8. New features of vue3
  9. vue-cli 引入腾讯地图(最新 api,rocketmq原理面试
  10. Vue 学习笔记(3,免费Java高级工程师学习资源
  11. Vue 学习笔记(2,Java编程视频教程
  12. Vue cli introduces Tencent maps (the latest API, rocketmq)
  13. Vue learning notes (3, free Java senior engineer learning resources)
  14. Vue learning notes (2, Java programming video tutorial)
  15. 【Vue】—props属性
  16. 【Vue】—创建组件
  17. [Vue] - props attribute
  18. [Vue] - create component
  19. 浅谈vue响应式原理及发布订阅模式和观察者模式
  20. On Vue responsive principle, publish subscribe mode and observer mode
  21. 浅谈vue响应式原理及发布订阅模式和观察者模式
  22. On Vue responsive principle, publish subscribe mode and observer mode
  23. Xiaobai can understand it. It only takes 4 steps to solve the problem of Vue keep alive cache component
  24. Publish, subscribe and observer of design patterns
  25. Summary of common content added in ES6 + (II)
  26. No.8 Vue element admin learning (III) vuex learning and login method analysis
  27. Write a mini webpack project construction tool
  28. Shopping cart (front-end static page preparation)
  29. Introduction to the fluent platform
  30. Webpack5 cache
  31. The difference between drop-down box select option and datalist
  32. CSS review (III)
  33. Node.js学习笔记【七】
  34. Node.js learning notes [VII]
  35. Vue Router根据后台数据加载不同的组件(思考-&gt;实现-&gt;不止于实现)
  36. Vue router loads different components according to background data (thinking - & gt; Implementation - & gt; (more than implementation)
  37. 【JQuery框架,Java编程教程视频下载
  38. [jQuery framework, Java programming tutorial video download
  39. Vue Router根据后台数据加载不同的组件(思考-&gt;实现-&gt;不止于实现)
  40. Vue router loads different components according to background data (thinking - & gt; Implementation - & gt; (more than implementation)
  41. 【Vue,阿里P8大佬亲自教你
  42. 【Vue基础知识总结 5,字节跳动算法工程师面试经验
  43. [Vue, Ali P8 teaches you personally
  44. [Vue basic knowledge summary 5. Interview experience of byte beating Algorithm Engineer
  45. 【问题记录】- 谷歌浏览器 Html生成PDF
  46. [problem record] - PDF generated by Google browser HTML
  47. 【问题记录】- 谷歌浏览器 Html生成PDF
  48. [problem record] - PDF generated by Google browser HTML
  49. 【JavaScript】查漏补缺 —数组中reduce()方法
  50. [JavaScript] leak checking and defect filling - reduce() method in array
  51. 【重识 HTML (3),350道Java面试真题分享
  52. 【重识 HTML (2),Java并发编程必会的多线程你竟然还不会
  53. 【重识 HTML (1),二本Java小菜鸟4面字节跳动被秒成渣渣
  54. [re recognize HTML (3) and share 350 real Java interview questions
  55. [re recognize HTML (2). Multithreading is a must for Java Concurrent Programming. How dare you not
  56. [re recognize HTML (1), two Java rookies' 4-sided bytes beat and become slag in seconds
  57. 【重识 HTML ,nginx面试题阿里
  58. 【重识 HTML (4),ELK原来这么简单
  59. [re recognize HTML, nginx interview questions]
  60. [re recognize HTML (4). Elk is so simple