dj(query).html(a) - Method

$('query').html(a) - Method

dj(query).html(a); This Function will return the innerHTML of element. 

 Syntax :-

    dj('#id').html();
    

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And if You want to set innerHTML of any element then pass the html in parameter of the html()
 Syntax :-

    dj('#id').html('<h1> New HTML Here </h1>');
    

The HTML of the Selected Element will be Changed.

More About .html(a) Method.

    Parameters => 1