JSFiddle - React, Tailwind, and code Playground
JavaScript
var el = $(document.body);
el.data("test", "test value");
var id = el.attr($.expando);
console.log("cache id: " + id);
console.log($.expando);
console.log("element data: " + el.data("test"));
console.log("the same piece of data directly from cache: " + $.cache[id].test);
console.log("let's remove all the data");
el.removeData();
console.log("element data: " + el.data("test"));
console.log("thу data is still in cache: " + $.cache[id].test);