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HTML documents are defined by HTML elements.
HTML Elements
An HTML element is everything from the start tag to the end tag:| Start tag * | Element content | End tag * |
|---|---|---|
| <p> | This is a paragraph | </p> |
| <a href="default.htm" > | This is a link | </a> |
| <br /> |
HTML Element Syntax
- An HTML element starts with a start tag / opening tag
- An HTML element ends with an end tag / closing tag
- The element content is everything between the start and the end tag
- Some HTML elements have empty content
- Empty elements are closed in the start tag
- Most HTML elements can have attributes
Nested HTML Elements
Most HTML elements can be nested (can contain other HTML elements).HTML documents consist of nested HTML elements.
HTML Document Example
| <html> <body> <p>This is my first paragraph.</p> </body> </html> |
HTML Example Explained
The <p> element:| <p>This is my first paragraph.</p> |
The element has a start tag <p> and an end tag </p>.
The element content is: This is my first paragraph.
The <body> element:
| <body> <p>This is my first paragraph.</p> </body> |
The element has a start tag <body> and an end tag </body>.
The element content is another HTML element (a p element).
The <html> element:
| <html> <body> <p>This is my first paragraph.</p> </body> </html> |
The element has a start tag <html> and an end tag </html>.
The element content is another HTML element (the body element).
Don't Forget the End Tag
Most browsers will display HTML correctly even if you forget the end tag:| <p>This is a paragraph <p>This is a paragraph |
Note: Future version of HTML will not allow you to skip end tags.
Empty HTML Elements
HTML elements with no content are called empty elements. Empty elements can be closed in the start tag.<br> is an empty element without a closing tag (the <br> tag defines a line break).
In XHTML, XML, and future versions of HTML, all elements must be closed.
Adding a slash to the start tag, like <br />, is the proper way of closing empty elements, accepted by HTML, XHTML and XML.
Even if <br> works in all browsers, writing <br /> instead is more future proof.
HTML Tip: Use Lowercase Tags
HTML tags are not case sensitive: <P> means the same as <p>. Many web sites use uppercase HTML tags.W3Schools use lowercase tags because the World Wide Web Consortium (W3C) recommends lowercase in HTML 4, and demands lowercase tags in future versions of (X)HTML.
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