JSFiddle - React, Tailwind, and code Playground

HTML

<div id="test" data-myjson='{"hello":"world"}'></div>
<button id="get_data">Get via `.data`</button>
<button id="get_attr">Get via `.attr`</button>

JavaScript

var test = $('#test');
$('#get_data').on('click', function() {
   console.log(test.data('myjson')); 
});
$('#get_attr').on('click', function() {
   console.log(test.attr('data-myjson')); 
});