"1" HTML first understanding

Source: Internet
Author: User

1. Mainstream browser

Shorthand EN CN
Ff Mozilla Firefox Firefox browser
Ie Internet Explorer IE browser
Chrome Google Chrome Google Chrome
Opera Opera Offnenbach Browser
Safari Safari Apple browser

2. Web editing tools

3. What is a Web page

    • A Web page is any page in a Web site, usually with a file name extension of HTML, or an HTM
    • A collection of Web pages used to display related content

4. Introduction to HTML

HTML (Hyper text mark-up Language) is a Hypertext Markup Language or Hyperlink language, is currently applied to a wide range of languages on the web, but also constitutes the main language of Web page documents. HTML text is a descriptive text made up of HTML commands that describe text, graphics, animations, sounds, tables, links, and so on.

HTML history

version year
Html 1991
html+ 1993
Html2.0 1995
Html3.2 1997
Html4.0.1 1999
XHtml1.0 2000
Html5 2012
Xhtml5 2013

5. HTML Features

    1. Ease of
    2. Scalability
    3. Platform-Independent

6. Basic HTML Component Unit

7. Basic HTML specification

Basic specification for Html4.0

    • The label signature and attribute name are not case sensitive
    • HTML tags don't have to close all
    • Attribute values are enclosed in quotation marks or without quotation marks.
    • Labels must be nested correctly
    • The document must have a root element, and all XHTML elements must be nested within the root element

XHTML Basic Specification

    • The label signature and attribute name must be lowercase
    • HTML tags must be closed
    • Attribute values must be enclosed in quotation marks.
    • Labels must be nested correctly
    • The document must have a root element, and all XHTML elements must be nested within the root element

Basic specification for HTML5

    • The HTML4 and XHTML specifications can be and are simplified on the basis of: progressive enhancement and graceful demotion

8. The difference between HTML5 and HTML4

    1. Statement <!DOCTYPE>
      HTML also has a number of different versions, only the exact HTML version of the page is fully understood,
      The browser will be able to display the HTML page completely correctly. That's the use.
HTML5:        <!doctype html>HTML4.01        <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01         Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">XHTML 1.0        <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    1. Document Type declaration
      5: <!doctype html>
      4:<!DOCTYPE html PUBLIC "-//W3C//DTD HTML //EN" >

Encoding settings

 <meta  charset  = "Utf-8" ;  <meta  http-equiv  = "Content-type"  content  = " text/html; Charset=utf-8 "/>   
<style></style>             type 省略<link href=“” rel=“stylesheet”/>    type 省略<script></script>               type省略

9. Start learning HTML

site : A site stores all the files contained in a Web site

站点的建立html的基本结构<html><head></head><body></body></html>常用的标签

Common tags

H1-h6<H1 algin="center">Title text</H1>    <H1>Title One</H1><!--logo settings --Can only occur once properties: Align Horizontal alignment: Center|right has level six heading p<p>Paragraph text</P>A blank line between the default paragraph and the paragraph<hr Color="Pink" size= "7" width ="100"  Align="left"/>Default Center Align Br<br/>Line wrapping img Single label setting width, etc. zoom Out | And only setting the height is not<img src="Picture address" width= "" height="" title = "" alt=""/>Span<span>Text</span>Div<div>Any Content</div>I<i>Italic text</i>Em<em>Italic text</em>A relative path and absolute path format are:<a href="Resource Address"target="window name" title=" Point to the text of the connection display>  Hyperlink Name</a>Strong<strong>Bold text</Strong>B<b>Bold text</b>Special Symbol:&nbsp; Blank space in the browser show the effect of different Firefox half three kinds of list label unordered list: Circle property value disc= solid circle circle= Hollow Circle Square= Square<ul type="Circle" start="3"><li>List Contents</li></ul>Sequence list: Type attribute value A (a b c) | A (a B C) |i| I start = "3" can only be followed by digital reversed flashbacks<ol><li>List Contents</li></ol>Definition list: (apply: Left-hand image)<dl><DT>Defining items</dt><dd>Description Item</dd></dl>&gt; greater than sign &lt; less than hyperlink tag target property: _blank<a href = "about.html"target=" title=""> I can be text, the page can be a picture</a>Can link content: HTML file | Audio and video | compression software (download) | pictures | Wps Internal Link< link own website >| External links< link someone else's website >href= "#" flag empty link Click Jump Header external link<a href="http://www.baidu.com"></a>

Path

relative path: The relative path refers to the path to the other file (or folder) that is caused by the path to which the file resides.
Relative path:

    1. Two files are placed in the same folder. Write a name image directly
    2. Two files in a different folder ... /folder name/file name<a href = "../img/2.jpg">img</a>
    3. A folder outside of a folder. Folder name/file name

absolute path : refers to the absolute address location of a file on a computer or network, starting with a drive letter or protocol name. For example:
File:///E|/works/Open Class/1/style/miancss.css
Http://cdn.bootcss.com/jquery/1.11.3/jquery.min.js

HTML5 added a label

<article><aside><audio><canvas><footer><header><hgroup><section><time><video>…等

HTML5 of the abolished label

1、能用css代替的元素basefont、big、center、font、s、strike、tt、u2、不再使用frameacronym dir isindex listing xmp nextid plaintex

Division of ————-Divisions —————
1: Business unit-need to do website
2: Design department-make picture format. jpg/.psd
3: Production department-cut into web front-end development engineer
4: Background Department-background program add data design Department

Website production process:

Recent Popularity-Flattening | 2010-Three-dimensional

Responsive Web site : Do a site can be both on the PC can also move the end;

Google Chrome can test mobile

You can insert a picture in a Web page: Picture

jpg/jpeg:可以存储丰富多彩的颜色,不支持动画和透明(人物/风景)保真  ===有损压缩gif:只存储256种颜色(少)赞 |小图片  支持动画|透明===有损压缩png:可以丰富多彩的图片|不支持动画|支持透明|占用空间大(运用多数移动移动端)===无损压缩

Api

Html_api Download access password 06ee
Css_api Download access password 08da

Self-study website
W3school

"1" HTML first understanding

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