What are HTML Attributes?

Example: <img src="/images/logo.gif" alt="Logo" width="400" height="300">

In the above example, there are 4 attributes of the image element. The name of these
attributes are src, alt, width and height. The corresponding values are /images/logo.gif,
Logo, 400 and 300.

• Any number of (legal) attributes can be added to an element.


• Attributes are added in the name="value" format.


• Attributes are separated by spaces.


• Attribute names are not case sensitive.


• It is a good coding practice to enclose attribute values within double quotes (").


• If quotes are not used, values can consist of letter (a-z and A-Z), digits (0-9),
  hyphens and periods.

Some commonly used HTML attributes

1. 
   

   align :

   
   Alignment attribute - Aligns the element in horizontal direction.
   
   Values - left | center | right
   
   Some related elements - <img>, <input>, <table>, <hr>,
   <th>, <td>, <tr>, <iframe>.
   
   
   
   


2. 
   

   valign :

   
   Vertical Alignment attribute - Aligns the element in vertical direction.
   
   Values - top | middle | baseline | bottom
   
   Some related elements - <th>, <td>, <tr>, <tbody>.
   
   
   
   


3. 
   

   width :

   
   Width attribute - Specifies the width of an element.
   
   Values - pixels | % of parent width
   
   Some related elements - <table>, <hr>, <iframe>, <img>,
   <td>, <th>.
   
   
   
   


4. 
   

   height :

   
   Height attribute - Specifies the height of an element.
   
   Values - pixels | % of parent height
   
   Some related elements - <table>, <hr>, <iframe>, <img>,
   <td>, <th>.
   
   
   
   


5. 
   

   size :

   
   Width attribute - Specifies the width of an element.
   
   Values - pixels | % of parent cell
   
   Some related elements - <table>, <hr>, <iframe>, <img>,
   <td>, <th>.
   
   
   
   


6. 
   

   face :

   
   Face attribute - Sets the face of a font attribute. Font faces are specified as
   comma-separated list. The font element attributes may not be supported in future HTML versions (deprecated).
   W3C recommends using style sheets for formatting instead of HTML formatting attributes.
   
   
   Some values - Arial | Verdana | Helvetica
   
   Related elements - <font>, <basefont>.