JSFiddle - React, Tailwind, and code Playground

HTML

<div role="button" id=":1vq.post" class="d-s-r tk3N6e-e tk3N6e-e-qc" aria-disabled="false" style="-webkit-user-select: none; " tabindex="0">Post comment</div>

JavaScript

function simulateClick(el) {
    var evt = document.createEvent('MouseEvents');
    evt.initMouseEvent('click', true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
    return el.dispatchEvent(evt);
}

var id = ':1vq.post';

var button = document.getElementById(id);

button.addEventListener('click', function () {
    alert('Click!');
}, true);

simulateClick(button);