jq(arg0, arg1, arg2)
    
    arg0: elm|query 

    syntax:-  elmSelector.method=assign 
    <elmSelector>
        #elmId
        $(css selector)
    <method>
        
        .x 
        .y 
        .w|width 
        .h|height 

        //class 
        add_class 
        rm_class 
        tggle_class 
        has_class 


        //
        .txt
        .html
        .href 
        .src 

        //style 
        .display 
        .fg 
        .bg 

        //
        .attr.<attr_name>
        .style.<prop>
        .dataset.<dataset_name>