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="<a href="https://www.w3schools.com">This is a link</a>">
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="img_girl.jpg">
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="img_girl.jpg" width="500" height="600">
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="img_girl.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.
<p style="color:red">I am a paragraph</p>
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>
<html lang="en-US">
<body>
...
</body>
</html>
We Suggest: Use Lowercase Attributes
The HTML5 standard does not require lowercase attribute names.
The title attribute can be written with uppercase or lowercase like title or TITLE.
W3C recommends lowercase in HTML, and demands lowercase for stricter document types like XHTML.
At we always use lowercase attribute names.
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:Chapter Summary
- All HTML elements can have attributes
- The
titleattribute provides additional "tool-tip" information - The
hrefattribute provides address information for links - The
widthandheightattributes provide size information for images - The
altattribute provides text for screen readers - At W3Schools we always use lowercase attribute names
- At W3Schools we always quote attribute values with double quotes.
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