How to make custom attribute in Html5 ?

Hi all, You can make your own custom attribute using data-. It allows possessive exchanged information between HTML and its DOM representation. It can work with javascript also, every browser will let you fetch and modify data- attributes using the getAttribute and setAttribute methods.

Example with css -  

css :-

section [data-index='123'] {
color:red;
width:200px;
}

-For full set of codes /steps, visit the complete Blog: How to make custom attribute in Html5 ?

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