JSFiddle - React, Tailwind, and code Playground

HTML

<p data-text="dict.dataP"></p>
<div id="dummy"></div>

JavaScript

var dict = {
    "dataP": "this is my p tag text",
    "dataDiv": "dummy div"
};

$.each(function () {
    if ($(this).attr("data-lang").length > 0) {
        $(this).html(
        $(this).attr('data-lang') /*we got a problem here*/ );
    }
});

$("#dummy").html(dict.dataDiv);