HTML 5 attributes are created using a name-value pair and are usually put alongside the tag name.
Name-value pairs
Name-value pairs are represented by a set of text strings in which name="value" and are usually separated by commas,semicolons,space or newline character.
Writing HTML 5 Atrributes
HTML 5 attributes are written inside the element's tag and separated by spaces. For example:
<input type="text" value="hello Web"/>
In this code the attributes are type and value and their values are "text" and "hello Web" respectively.
What do Attributes do
Attributes give extra information about an element for example in the input element the attribute type gives the type of input, so if he had type="button" we would get a button instead of a textbox.Attributes are very important to HTML and without them Web development would be probably much harder.
Special Attributes
HTML 5 has some special attributes that I must point out.
The Id Attribute
The Id attribute is a unique Identifier for the element.The Id property becomes very useful when using CSS and JavaScript.An example of the Id Attribute.
<form id="htm_form">
</form>
The name Attribute
The name Attribute specifies a name for an element.Conventionally groups if elements can have the same name.
The class attribute
This specifies the style class under which an element falls. NB:An Attribute can also be called a property