Author: Michal Szymanski
Attributes provide additional information about HTML elements.
- 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
<a href="https://mdbootstrap.com">I am a link</a>
You will learn more about links and the
<a> tag later in this
The src Attribute
HTML images are defined with the
The filename of the image source is specified in the
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="https://mdbootstrap.com/img/logo/mdb192x192.jpg" width="500" height="600">
The image size is specified in pixels: width="500" means 500 pixels wide.
The alt Attribute
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="https://mdbootstrap.com/img/logo/mdb192x192.jpg" alt="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.jpg" alt="Girl with a jacket">
The style Attribute
style attribute is used to specify the styling of an element, like
font, size etc.
<p style="color:green">I am a green paragraph</p>
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
The language is declared with the
Declaring a language is important for accessibility applications (screen readers) and search engines:
<!DOCTYPE html> <html lang="en-US"> <body> ... </body> </html>
The first two letters specify the language (en). If there is a dialect, use two more letters (US).
The title Attribute
title attribute is added to the
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. </p>
Hover your mouse over the paragraph below.
Hover me to see a tooltip.
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