HTML Reference

HTML tags are the building blocks of web pages.
To write a tag you wrap a tag name with angle brackets, '<' and '>', for example <caption>

Here is the general syntax with an opening tag and a closing tag:

<tagname> ... </tagname>

Below are some examples.

• <h1>,<h2>, <h3>, <h4>, <h5>, <h6> - defines heading.
• <p> - defines a paragraph
• <a> (anchor) - defines a hyperlink
• <hr> - defines a horizontal line
• <ul> - defines an unordered list of items
• <img> - defines an image
• <article> - defines an article
• <input> - defines a data input element

For a complete list of tags see our HTML Tag List Reference

HTML tags often work together with other tags to create more complex UI features. For example, creating a table requires at least 3 different tags: <table>, <tr>, and <td>.

We refer to these cooperating tags as Tag Groups.
Several tag groups can be identified.

• Page group - defines the page structure including meta data.
• Layout group - defines page layouts with headers, navbars, etc.
• Table group - defines tables for tabular data displays.
• Form group - defines forms for data entry.
• Text group - defines formatted text documents.
• List group - defines ordered and unordered lists with data items.
• Media group - defines multimedia experiences with audio, video, etc.

Attributes add additional information to a tag by modifying the appearance or functionality of an element. Here is the general syntax with an attribute inside the opening tag:

<tagname attribute="value"> ... </tagname>

Where attribute is the name of the attribute, and value is the value of the attribute.
Below are some attribute examples.

• href - defines the URL for a link
• type - defines a type of an element
• name - assigns a name to an element
• readonly -- sets a control to read-only
• src - specifies the source (URL) of an element
• width - defines an element's width in pixels
• maxlength - sets the maximum length for an input element

For a complete list of attributes see our HTML Attributes Reference

Global attributes are attributes that can be applied to any HTML element.
Here are some examples.

• id - adds a unique identifier to an element.
• class - adds a CSS class to an element to quickly style an element.
• style - adds CSS styles directly to an element.
• data-* - adds a hidden data item to an element.
• hidden - makes an element invisible.

For a complete list see our HTML Global Attributes Reference

Our Tag References include HTML Method and HTML Code lists for easy reference.
These include:

• HTTP Methods - standard HTTP request methods.
• HTTP Status Codes - standard HTTP request result codes.
• HTML Country Codes - standards HTML country codes.
• HTML Language Codes - standard HTML language codes.

• Our HTML Tag List
• Our HTML Attribute List
• Our CSS Tutorial
• Our SQL Tutorial