TEACHINCAL WEB YOUTUBE CHANNEL
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"
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The href Attribute
HTML links are defined with the<a> tag. The link address is specified in the href attribute:Example
<a href="https://Teachincal web">This is a link</a>
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:Example
<img src="img_girl.jpg">
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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:Example
<img src="img_girl.jpg" width="500" height="600">
The image size is specified in pixels: width="500" means 500 pixels wide.
You will learn more about images in our HTML Images
chapter.
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The alt Attribute
Thealt 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.
Example
<img src="img_girl.jpg" alt="Girl
with a jacket">
The alt attribute is also useful if the image does not exist:
Example
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
The style attribute is used to specify the styling of an element, like color,
font, size etc.
Example
<p style="color:red">I am a paragraph</p>
You will learn more about styling later in this tutorial, and in our
CSS Tutorial.
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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">
<body>
...
</body>
</html>
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:
Example
<p title="I'm a tooltip">
This is a paragraph.
</p>
We Suggest: Quote Attribute Values
The HTML5 standard does not require quotes around attribute values.
The href attribute, demonstrated above, can be written without quotes:
Bad
<a
href=https://www.w3schools.com>
Good
<a href="https://www.w3schools.com">
Single or Double Quotes?
Double quotes around attribute values are the most common in HTML, but single
quotes can also be used.
In some situations, when the attribute value itself contains double quotes, it is necessary to use single quotes:
<p title='teachanical web'>
Or vice versa:
<p title="John 'ShotGun' Nelson">
Chapter Summary
- All HTML elements can have attributes
- The
title attribute provides additional "tool-tip" information
- The
href attribute provides address information for links
- The
width and height attributes provide size information for images
- The
alt attribute provides text for screen readers
- At W3Schools we always use lowercase attribute names
- At W3Schools we always quote attribute values with double quotes
HTML Attributes
Below is an alphabetical list of some attributes often used in HTML, which you will learn more about in this tutorial:
Attribute
Description
alt
Specifies an alternative text for an image, when the image cannot be
displayed
disabled
Specifies that an input element should be disabled
href
Specifies the URL (web address) for a link
id
Specifies a unique id for an element
src
Specifies the URL (web address) for an image
style
Specifies an inline CSS style for an element
title
Specifies extra information about an element (displayed as a tool tip)
A complete list of all attributes for each HTML element, is listed in our:
HTML Attribute Reference.
MR.SWARAN AULAKH
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