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The Web is a collection of hypertext files, which are the basic components of the web, also known as Web pages or HTML documents, Web pages, and so on, typically files with the. HTML or. htm suffix. Web pages are organized together by hyperlinks in hypertext.
What is HTML?HTML (Hypertext Markup Language): Hypertext Markup Language, a plain text-type language that is interpreted by the browser for execution. Use a "tag" with angle brackets to identify the contents of a Web page. The main purpose of HTML is to design the Web page, the HTML page can be applied to VBScript, JavaScript written program segments.
HTML Base SyntaxMarkup SyntaxThe symbols that HTML uses to describe functionality are called "tags", such as <p>,
Enclosing type tag (also called Double mark):
< Mark > content </ tags ><b> This is a B tag </ b >
The enclosing type tag must appear in pairs.
A non-enclosing type tag (also called an empty tag or a single tag).
</> or < tags >
Empty tags are typically used to represent special effects such as:
The element is the tag, and the element is the part of each pair of angle brackets, such as the part of <body></body> that is called the BODY element. Elements are like small labels that identify different parts of a Web page document. An element can contain text content and other elements, or it can be empty.
element NestingElements can be nested with each other, but be aware of the nesting order of the tags.
Properties and Valuesproperty is used to decorate the element, and the declaration of the attribute must be in the start tag.
< Tag Attribute declaration location ></ Mark > < Tag Attribute declaration location />
An element may have more than one attribute, separated by a space between multiple properties, and the first attribute to be marked with a space. The precedence is not distinguished between multiple attributes.
< Properties 2 Properties 3></ tags >
Each property has a value, and the value of the property and property is concatenated with an equal sign, and the value of the property is enclosed in single or double quotation marks.
<align= "center"> paragraph </p>
Where align is the property name, center is the property value.
Standard PropertiesEach element has its own properties, and some are properties that are supported by most elements, known as standard properties or common properties.
Adding the appropriate annotations to your code is a good coding habit, and annotations are visible only in the case of editing the document, which is not displayed when the page is displayed, and the syntax for adding comments is as follows:
<!-- -
Attention:
December 24, 1999, the world's most recommended standard HTML 4.01,xhtml in 2000 January 26 became the world standard.
XHTML is almost identical to HTML 4.01, except that XHTML is a more restrictive version of HTML.
HTML5< P > < BR > the paragraphxhtml element must be closed, and the empty tag will be closed < P > < BR > Paragraph
The goal of HTML5 is to make the HTML code more concise.
<PAlign= "Rigth">This is a<BR/>Paragraph</P>or<PAlign= "Rigth">This is a<BR>Paragraph</P><inputtype= "text"ReadOnly= "ReadOnly" />or<inputtype= "text"ReadOnly/>
HTML5 no longer demands code format and guarantees compatibility.
Document structurestructure of the HTML documentHTML documents primarily contain document type declarations and HTML pages.
Document Type declarationSpecify the version and style at the beginning of the document with the DOCTYPE declaration, letting the browser know the version, type, and style of the document.
<! DOCTYPE html>
The containing element of the entire document, after the document type declaration of DOCTYPE. The
The
Document Header Content-<title>Caption elements <title> </title> defines a title for a document, and the caption element has the following characteristics:
Metadata element <meta> is used to define the basic information of a Web page, is an empty tag, commonly used properties are: Content, http-equiv.
<body> ElementsThe <body> element appears after the
HTML5 Basic Syntax
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