HTML Attributes

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HTML Attributes provide additional information about HTML elements. Attributes are the power behind HTML.


What is HTML Attribute?

In HTML, an attribute is a modifier of an HTML element that provides essential information about the element.

HTML Attributes help to customize HTML elements by adding details such as identifiers, styles, links, and more.

Every HTML element can contain attributes if needed.

Attributes always appear inside the opening tag of an element.

Attributes typically consist of a name and a value, separated by an equals sign like name="value" (For example: height="20px")

Notes:

HTML Atrributes are case insensitive.

Always quote attribute values.


Common HTML Attribures

Some attributes are frequently used in web development. Let's take a look at them.

id, class, style, href, src, alt, title, width, height,

The id attribute

The id attribute assigns a unique identifier or name to an HTML element.

IDs are especially useful when you want to style or target a specific element.

Example:

<p id="earth">Earth's beauty is truly unique.</p>


The class attribute

The class attribute defines a group of elements to apply the same styling or behavior to them.

Example:

<p class="planet">Earth is the third planet from the Sun in our solar system.</p>


The style attribute

The style attribute lets you apply inline CSS styling to elements.

This is useful for adding specific styling directly to a tag without using an external stylesheet.

Example:

<p style="color: green; font-size: 16px;">This is my styled Paragraph.</p>

Try It Yourself

The color and font-size are CSS properties. You will learn more about them in our CSS Tutorial


The href Attribute

The <a> (anchor) tag used to create a hyperlink.

The href attribute specifies the destination URL for the hyperlink.

When a user clicks on the link, the browser navigates to the specified URL.

Example

<a href="https://w3studies.com">Visit W3Studies</a>

Try It Yourself



Note:

The href attribute is mostly used for creating hyperlinks.

It can also be used in various other ways to link to email addresses, sections of the page, or files.


The src (source) attribute

The src (source) attribute in HTML specifies the location (URL) of external files.

The src attribute allows you to embed media or external files directly into a webpage

It is used by certain elements, such as images, audio, video, iframes, and scripts.

Example:

<img src="cute_girl.jpg" />

Note:

There are two ways to specify the URL in the src attribute:

Relateive URL: Links to an image hosted on an external website.
Example: src="https://www.w3studies.com/images/cute_girl.jpg".

Absolute URL: Links to an image hosted on an external website.
Example: src="/images/cute_girl.jpg".


The alt attribute

The alt attribute provides alternative text for an image

The text alternatively displayed if the image cannot be displayed.

The alt attribute is helpful for accessibility.

Example:

<img src="little_baby.jpg" alt="This is a profile picture"/>

The width and height attribute

The width and height attributes define the image size and they are commonly used with <img> elements. They can also be applied to other tags, like<iframe>.

You will learn about <iframe> latter.

Example:

<img src="profile_picture.jpg" width="100px" height="50px"/>



Notes:

Atrributes are case insensitive So you can use name="value" or NAME="VALUE". But our recomendation is always use lowercase it's helpful for understanding and read HTML code

Alays quote attribute value

>> Learn all HTML attribute in "HTML Reference" chapter.

How to Use Multiple Attributes?

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