html attributes

HTML Attributes: Various Attributes Of HTML – Chapter 5

Attributes provide additional information about HTML elements.

HTML Attributes

  • All HTML elements can have attributes
  • Attributes provide additional information about an element
  • We always specify all the HTML attributes 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. We can specify the link address in the href attribute.

Example

<a href=”https://www.geektutes.com”>This is a link</a>
You will learn in detail 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”>

The width and height Attributes

All the 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.

The alt Attribute

The alt attribute specifies an alternative text to be used, when an image cannot be displayed. We can easily read the value of the attribute by screen readers. In this way, if someone “listening” to the webpage, e.g. a blind person, can “hear” the element.

Example

<img src=”img_boy.jpg” alt=”Boy with a bicycle”>
The alt attribute is also useful in case 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=”Boy with a bicycle”>

The style Attribute

We use the style attribute 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.

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: Use Lowercase HTML Attributes

The HTML5 standard does not require lowercase attribute names. We can use the title attribute either in uppercase or lowercase like title or TITLE. Geektutes recommends lowercase in HTML, and demands lowercase for stricter document types like XHTML.
At Geektutes 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:

Bad

<a href=https://www.geektutes.com>

Good

<a href=”https://www.geektutes.com”>
Geektutes recommends quotes in HTML, and demands quotes for stricter document types like XHTML. Sometimes it is necessary to use quotes. The below example will not display the title attribute correctly, because it contains a space:

Example

 
<p title=About Geektutes>
Using quotes are the most common. Omitting quotes can produce errors. At Geektutes we always use quotes around attribute values.

Single or Double Quotes?

Double quotes around attribute values are the most common in HTML, but we can also use single quotes. In some situations, when the attribute value itself contains double quotes, it is required to use single quotes:
<p title=’John “ShotGun” Nelson’>
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 gives us size information for images
  • The alt attribute provides text for screen readers
  • At Geektutes we always use lowercase attribute names
  • At Geektutes we always quote attribute values with double quotes
 
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Mukul Singh

Hi! I am Engineer by Education, Web-Developer by Profession, Digital Marketing by Interest, Blogger by Passion...

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