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In this video, I am telling about what is id and classes in html full explain. The HTML id attribute is used to specify a unique id for an HTML element. You cannot have more than one element with the same id in an HTML document.
Using The id Attribute
The id attribute specifies a unique id for an HTML element. The value of the id attribute must be unique within the HTML document.
The id attribute is used to point to a specific style declaration in a style sheet. It is also used by JavaScript to access and manipulate the element with the specific id.
The syntax for id is: write a hash character (#), followed by an id name. Then, define the CSS properties within curly braces {}.
In the following example, we have an h1 element that points to the id name "myHeader". This h1 element will be styled according to the #myHeader style definition in the head section:
Using The class Attribute
The class attribute is often used to point to a class name in a style sheet. It can also be used by JavaScript to access and manipulate elements with a specific class name.
In the following example we have three div elements with a class attribute with the value of "city". All of the three div elements will be styled equally according to the .city style definition in the head section:
