Concept: HTML (Hypertext Markup Language) is a Hypertext Markup Language used to create webpage files. HTML consists of a series of tags. It can be said that the essence of HTML is to organize text, tables, images, and other webpage elements into a webpage by combining and embedding various tags.
Tag: There are many types of tags in HTML, but they are generally not divided into two categories: Header tag
The Header element tag contains the following important tags:
1. Title mark. Start with <title> and end with </title>. The content between tags is the webpage title content, which is displayed in the title bar of the browser.
2. meta tag. Meta tag <meta> is used to define the names and Keywords of page information. <Meta> tags are not paired. It defines page information in the form of properties. Take setting the page keyword as an example. The attribute value of the name of the page keyword is keyword, which is used by the search engine to describe the keywords of the webpage and help the search engine to search for and classify the webpage, this increases the probability of being searched. You can set multiple keywords separated by commas, for example, <meta name = "keyword" content = "content1, content2, content3">. In addition to setting keywords, you can set the name attribute value to description to describe the subject of a webpage. <meta name = "description" content = "this is a learning webpage">, you can use the refresh attribute to regularly refresh the webpage or perform timed webpage jump operations. <Meta http-equiv = "refresh" content = "interval; url = connection address"> (the interval is calculated in seconds ). Www.2cto.com
The subject tag starts with <body> and ends with </body>. There are many tags in the subject tag. This section briefly introduces the functions of several common tags under the subject:
Mark
Function
Used in pairs
<P>
Create a segment. <P align = "#"> attribute align indicates the method of the segment, # It can be left, center, right, justify.
Yes
<Br>
Create an empty line for line feed
No
<Hr>
Insert a horizontal line. <Hr color = "clr"> attribute color is used to specify the color of a line. clr can be red, blue, green, or expressed in hexadecimal notation.
Yes
<Center>
Center text display
Yes
<Hn>
This parameter is used to specify the titles of a document. n is an integer ranging from 1 to 6. <Hn align = "#">.
Yes
<Font>
Used to set the font. Attribute size indicates the font size. n can be an integer ranging from 1 to 7. <Font size = n color = "clr">
Yes
<B>
Make text bold
Yes
<I>
Make text Italic
Yes
<Ol>
Used with <li> nesting, specifying the numbering format and sequence, and specifying the numbering system type with the type attribute
Yes
<Ul>
Used with <li> nesting to create a list with the project symbol and specify the symbol style with the type attribute
Yes
<Table>
Defines table elements with attributes such as align, border, and bgcolor.
Yes
<Caption>
Nested in <table>, used to define the table title
Yes
<Tr>
Nested in <table>, add a new row to the table
Yes
<Th>
Nested in <table>, used to define the Header element
Yes
<Td>
Nested in <table>, used to define Cells
Yes
<Form>
It is combined with related elements nested in it to generate a form on the webpage. The Method attribute is used to specify the Method used by the Project Server to submit a form. There are two methods: get and post. The get method is used when the data volume is small and does not require security. Otherwise, the post method is used.
Yes
<Input>
Nested in <table> or <form>, you can use the type attribute to specify the value of the type attribute of the input element, such as text, submit, reset, password, radio, checkbox, and hidden, displays the single-line text input control, submit button, reset button, password input control single-choice button, check box, and hide the control.
No
<Select>
Bed History Table
Yes
<Option>
Nested in <select> to provide list items in the list box
Yes
<A>
Used to implement hyperlinks. The value of the href attribute is the connection address. <a>... </A> the text is the connection text on the webpage.
Yes
It is used to embed images in webpages. the src attribute is the position of image resources, and the width and height attributes are used to specify the width and height of the image respectively.
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