a/19949588/1636522

by wared

HTML

<button>login</button>
<div><i>Loading...</i></div>

CSS

*{font-family:Consolas}

JavaScript

var loaded = false, clicked = false;

$('button').one('click', function handler() {
    if (clicked = !loaded) {
        $(this).one('click', handler);
        return;
    }
    $('div').append('Logged in.<br/>');
});

setTimeout(function () {
    loaded = true;
    $('div').html('Loading complete.<br/>');
    if (clicked) $('button').trigger('click');
}, 3000);