HTML attributes

Author: MDBootstrap

Attributes provide additional information about HTML elements.

HTML Attributes

  • All HTML elements can have attributes
  • Attributes provide additional information about an element
  • Attributes are always specified in the start tag
  • Attributes usually come in name/value pairs like: name="value"

The href Attribute

HTML links are defined with the <a> tag. The link address is specified in the href attribute:

                    <a href="">I am a link</a>

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You will learn more about links and the <a> tag later in this tutorial.

The src Attribute

HTML images are defined with the <img> tag.

The filename of the image source is specified in the src attribute:

                    <img src="">

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The width and height Attributes

Images in HTML have a set of size attributes, which specifies the width and height of the image:

                    <img src="" width="500" height="600">

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The image size is specified in pixels: width="500" means 500 pixels wide.

The alt Attribute

The alt attribute specifies an alternative text to be used, when an image cannot be displayed.

The value of the attribute can be read by screen readers. This way, someone "listening" to the webpage, e.g. a vision impaired person, can "hear" the element.

            <img src="" alt="MDB logo with dark background">


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MDB logo with dark background

Note: The alt attribute is also useful if the image does not exist:

See what happens if we try to display an image that does not exist:

                    <img src="img_typo.webp" alt="Girl with a jacket">

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Girl with a jacket

The style Attribute

The style attribute is used to specify the styling of an element, like color, font, size etc.

                      <p style="color:green">I am a green paragraph</p>

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I am a green paragraph

Note: You will learn more about styling in the next tutorials.

The lang Attribute

The language of the document can be declared in the <html> tag.

The language is declared with the lang attribute.

Declaring a language is important for accessibility applications (screen readers) and search engines:

                      <!DOCTYPE html>
                        <html lang="en-US">

The first two letters specify the language (en). If there is a dialect, use two more letters (US).

The title Attribute

Here, a title attribute is added to the <p> element. The value of the title attribute will be displayed as a tooltip when you mouse over the paragraph:

                      <p title="I'm a tooltip">
                          Hover me to see a tooltip.

Hover your mouse over the paragraph below.

Hover me to see a tooltip.

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