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HTML

What is HTML ?

HTML Editors

HTML Basic Examples

HTML Elements

HTML Attributes

HTML Headings

HTML Paragraphs

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HTML Elements

HTML documents are made up by HTML elements.


HTML Elements

HTML elements are written with a start tag, with an end tag, with the content in between:

<tagname>content</tagname>

The HTML element is everything from the start tag to the end tag:

<p>My first paragraph.</p>

Start tag Element content End tag
<h1> My First Heading </h1>
<p> My first paragraph. </p>
<br>    
  Some HTML elements do not have an end tag.

Nested HTML Elements

HTML elements can be nested (elements can contain elements).

All HTML documents consist of nested HTML elements.

This example contains 4 HTML elements:

Example

<!DOCTYPE html>
<html>

<body>
   <h1>My First Heading</h1>
   <p>My first paragraph.</p>
</body>

</html>

HTML Example Explained

The <html> element defines the whole document.

It has a start tag <html> and an end tag </html>.

The element content is another HTML element (the <body> element).

<html>

<body>
   <h1>My First Heading</h1>
   <p>My first paragraph.</p>
</body>

</html>

The <body> element defines the document body.

It has a start tag <body> and an end tag </body>.

The element content is two other HTML elements (<h1> and <p>).

<body>
   <h1>My First Heading</h1>
   <p>My first paragraph.</p>
</body>

The <h1> element defines a heading.

It has a start tag <h1> and an end tag </h1>.

The element content is: My First Heading.

<h1>My First Heading</h1>

The <p> element defines a paragraph.

It has a start tag <p> and an end tag </p>.

The element content is: My first paragraph.

<p>My first paragraph.</p>


Don't Forget the End Tag

Some HTML elements will display correctly, even if you forget the end tag:

Example

<html>

<body>
   <p>This is a paragraph
   <p>This is a paragraph 
</body>

</html>

The example above works in all browsers, because the closing tag is considered optional.

Never rely on this. It might 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).

Empty element can be "closed" in the opening tag like this: <br />.

HTML5 does not require empty elements to be closed. But if you need stricter validation, and make your document readable by XML parsers, please close all HTML elements. 


HTML Tip: Use Lowercase Tags

HTML tags are not case sensitive: <P> means the same as <p>.

The HTML5 standard does not require lowercase tags, but W3C recommends lowercase in HTML4, and demandslowercase for stricter document types like XHTML.