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Element Association

$.data(Element e, String key, Any value)<br>Associate arbitrary data with an element.<br><br>$.data(Element e[, String key])<br>Return the value associated with an element.<br>$.hasData(Element e)Determine if an element has any associated data.<br>$.removeData(Element e [, String key])<br>Remove a piece of data previously associated with an element.
RESETRUNFULL
<!DOCTYPE html><html><head>
   <script src="jquery-3.5.1.min.js"></script></head><body>
   <div></div>
   <script>
   d = $('div')[0];
   $.data(d, 'a', 100);
   $.data(d, 'b', 200);
   alert($.data(d,'a'));  // 100
   alert($.data(d).b);  // 200
   $.removeData(d);
   alert($.data(d).b);  // undefined
   </script></body></html>

<!DOCTYPE html><html><head>
   <script src="jquery-3.5.1.min.js"></script></head><body>
   <p>Hello World</p>
   <script>
   $('p').fadeOut(5000)
           .fadeIn(5000)
           .slideUp(5000)
           .slideDown(5000);
   $.queue($('p')[0],'fx',function(){
      alert('animation completed!');});
   </script></body></html>