HTML Attributes
- All HTML elements can have attributes
- Attributes provide additional information about elements
- Attributes are always specified in the start tag
- Attributes usually come in name/value pairs like: name="value"
The href Attribute
<a>
tag defines a hyperlink. The href
attribute specifies the URL of the page the link goes to:Example
The src Attribute
The <img>
tag is used to embed an image in an HTML page. The src
attribute specifies the path to the image to be displayed:
Example
<img src="img_2.jpg">
The width and height Attributes
The <img>
tag should also contain the width
and height
attributes, which specifies the width and height of the image (in pixels):
<img src="img_2.jpg" width="500" height="600">
The alt Attribute
The required alt
attribute for the <img>
tag specifies an alternate text for an image, if the image for some reason cannot be displayed. This can be due to slow connection, or an error in the src
attribute, or if the user uses a screen reader.
Example
<img src="img_2.jpg" alt="Girl under the tree">
Example
See what happens if we try to display an image that does not exist:
<img src="img_typ.jpg" alt="Girl under the tree">
The style Attribute
The style
attribute is used to add styles to an element, such as color, font, size, and more.
Example
<p style="color:red;">This is a red paragraph.</p>
The title Attribute
The title
attribute defines some extra information about an element.
The value of the title attribute will be displayed as a tooltip when you mouse over the element:
Example
<p title="I'm a Smashcoder">This is a paragraph.</p>
We Suggest: Always Use Lowercase Attributes
The HTML standard does not require lowercase attribute names.
The title attribute (and all other attributes) can be written with uppercase or lowercase like title or TITLE.
However, Roar Coding recommends lowercase attributes in HTML, and demands lowercase attributes for stricter document types like XHTML.
We Suggest: Always Quote Attribute Values
The HTML standard does not require quotes around attribute values.
However, Roar Coding recommends quotes in HTML, and demands quotes for stricter document types like XHTML.
Good:
<a href="https://codingroar.blogspot.com">Visit our HTML tutorial</a>
Bad:
<a href=https://www.codingroar.blogspot.com/html/>Visit our HTML tutorial</a>
Sometimes you have to use quotes. This example will not display the title attribute correctly, because it contains a space:
Example
<p title=home codingroar>
Chapter Summary
- All HTML elements can have attributes.
- The
href
attribute of<a>
specifies the URL of the page the link goes to. - The
src
attribute of<img>
specifies the path to the image to be displayed. - The
width
andheight
attributes of<img>
provide size information for images. - The
alt
attribute of<img>
provides an alternate text for an image. - The
style
attribute is used to add styles to an element, such as color, font, size, and more. - The
lang
attribute of the<html>
tag declares the language of the Web page. - The
title
attribute defines some extra information about an element.
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