JSFiddle - React, Tailwind, and code Playground

HTML

<button>Click Me!</button>
<div id="something">This is hidden until the button is clicked</div>
<div>Clicking here should remove it</div>

CSS

#something {
    display: none;
}

JavaScript

$("button").on('mouseup', function (event1) {
    $("#something").show();
});

$(document).on('mouseup', function (event2) {
    if(event2.target != $("button")[0]) {
        $("#something").hide();
    }
});