JSFiddle - React, Tailwind, and code Playground

by rwaldron

JavaScript

$.fn.hasData = function(key) {
  return !(typeof $(this).data(key) == "undefined");
}; 

var a = $("<div/>");
console.log( !a.data("darthvader") );

a.data("darthvader", "sith");
console.log( !!a.data("darthvader") );

a.removeData("darthvader");
console.log( !a.data("darthvader") );