HTML documents are defined by HTML elements.
The example above contains three HTML elements <HTML><body><p> with their closing tags closing of opening tags done in reverse hierarchy always.
<p>This is paragraph.</p>
The element has a start tag <p> and an end tag </p>.
The <p> element defines a paragraph in the HTML document.
The element content is: This is paragraph.
The <body> element:
<body>
<p>This is paragraph.</p>
</body>
The <body> element defines the body of the HTML document.
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 paragraph.</p>
</body>
</html>
HTML Elements
An HTML element is everything from the start/opening tag to the end/closing tag:
Start tag Element content End tag
<p> This is a paragraph </p>
<a href="default.htm"> This is a link </a>
<br> </br>
* The start tag is often called the opening tag. The end tag is often called the closing tag.
Start tag Element content End tag
<p> This is a paragraph </p>
<a href="default.htm"> This is a link </a>
<br> </br>
* The start tag is often called the opening tag. The end tag is often called the closing tag.
HTML Element Syntax
• An HTML element starts with a start tag / opening tag
• The element content is everything between the start and the end tag
• Some HTML elements have empty content
• Most HTML elements can have attributes
• An HTML element ends with an end tag / closing tag
• Empty elements are closed in the start tag
• The element content is everything between the start and the end tag
• Some HTML elements have empty content
• Most HTML elements can have attributes
• An HTML element ends with an end tag / closing tag
• Empty elements are closed in the start tag
Nested HTML Elements
Most HTML elements can be nested (can contain other HTML elements).
HTML documents consist of nested HTML elements.
Example of HTML code
<!DOCTYPE html>
<html>
<body>
<p>This is paragraph.</p>
</body>
</html>
HTML documents consist of nested HTML elements.
Example of HTML code
<!DOCTYPE html>
<html>
<body>
<p>This is paragraph.</p>
</body>
</html>
The example above contains three HTML elements <HTML><body><p> with their closing tags closing of opening tags done in reverse hierarchy always.
HTML Example Explanation
The <p> element:<p>This is paragraph.</p>
The element has a start tag <p> and an end tag </p>.
The <p> element defines a paragraph in the HTML document.
The element content is: This is paragraph.
The <body> element:
<body>
<p>This is paragraph.</p>
</body>
The <body> element defines the body of the HTML document.
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 paragraph.</p>
</body>
</html>
The <html> element defines the whole HTML document.
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
Some HTML elements might display correctly even if you forget the end tag:
<p>This is a paragraph
<p>This is a paragraph
The example above works in most browsers, because the closing tag is considered optional.
Never rely on this. Many HTML elements will produce unexpected results and/or errors if you forget the end tag .
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
Some HTML elements might display correctly even if you forget the end tag:
<p>This is a paragraph
<p>This is a paragraph
The example above works in most browsers, because the closing tag is considered optional.
Never rely on this. Many HTML elements will produce unexpected results and/or errors if you forget the end tag .
Empty HTML Elements
HTML elements with no content are called empty elements.
<br> is an empty element without a closing tag (the <br> tag defines a line break).
Tip: In XHTML, all elements must be closed. Adding a slash inside the start tag, like <br />, is the proper way of closing empty elements in XHTML (and XML).
TIP: Use tags in Lowercase.
HTML tags are not case sensitive: <P> means the same as <p>. Many web sites use uppercase HTML tags.
the World Wide Web Consortium (W3C) recommends lowercase in HTML 4, and demands lowercase tags in XHTML.
<br> is an empty element without a closing tag (the <br> tag defines a line break).
Tip: In XHTML, all elements must be closed. Adding a slash inside the start tag, like <br />, is the proper way of closing empty elements in XHTML (and XML).
TIP: Use tags in Lowercase.
HTML tags are not case sensitive: <P> means the same as <p>. Many web sites use uppercase HTML tags.
the World Wide Web Consortium (W3C) recommends lowercase in HTML 4, and demands lowercase tags in XHTML.
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