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HTML attributes provide additional information about HTML elements
The <a>
tag defines a hyperlink. The
href
attribute specifies the URL of the page
the link goes to:
<a href="/">Visit w3resource</a>
You will learn more about links in our HTML Links chapter.
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:
<img src="img_girl.jpg">
There are two ways to specify the URL in the src
attribute:
The <img>
tag should also contain the
width
and
height
attributes, which specify the width and
height of the image (in pixels):
<img src="img_girl.jpg" width="500" height="600">
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
a slow connection, or an error in the src
attribute, or if the user uses a screen
reader.
<img src="img_girl.jpg" alt="Girl
with a jacket">
See what happens if we try to display an image that does not exist:
<img src="img_typo.jpg" alt="Girl
with a jacket">
You will learn more about images in our HTML Images chapter.
The style
attribute is used to add styles to
an element, such as color, font, size, and more.
<p style="color:red;">This is a red paragraph.</p>
You will learn more about styles in our HTML Styles chapter.
You should always include the lang
attribute
inside the <html>
tag, to declare the
language of the Web page. This is meant to assist search engines and browsers.
The following example specifies English as the language:
<!DOCTYPE html>
<html lang="en">
<body>
...
</body>
</html>
Country codes can also be added to the language code in the lang
attribute. So, the first two characters define the language of the HTML page,
and the last two characters define the country.
The following example specifies English as the language and United States as the country:
<!DOCTYPE html>
<html lang="en-US">
<body>
...
</body>
</html>
You can see all the language codes in our HTML Language Code Reference.
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:
<p title="I'm a tooltip">This is a paragraph.</p>
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, W3C recommends lowercase attributes in HTML, and demands lowercase attributes for stricter document types like XHTML.
At w3resource we always use lowercase attribute names.
The HTML standard does not require quotes around attribute values.
However, W3C recommends quotes in HTML, and demands quotes for stricter document types like XHTML.
<a href="/html/">Visit our HTML tutorial</a>
<a href=/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:
<p
title=About w3resource>
At w3resource we always use quotes around attribute values.
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='John "ShotGun" Nelson'>
Or vice versa:
<p title="John 'ShotGun' Nelson">
href
attribute of
<a>
specifies the URL of the page the link goes tosrc
attribute of
<img>
specifies the path to the image to be displayedwidth
and height
attributes
of <img>
provide size information for imagesalt
attribute of
<img>
provides an alternate text for an imagestyle
attribute is used to add styles
to an element, such as color, font, size, and morelang
attribute
of the <html>
tag declares the
language of the Web pagetitle
attribute defines some extra
information about an elementAdd a "tooltip" to the paragraph below with the text "About w3resource".
A complete list of all attributes for each HTML element, is listed in our: HTML Attribute Reference.