JSFiddle - React, Tailwind, and code Playground

HTML

<div id="lista" style="">
    <ul>
        <li>Div1</li>
        <li>Div2</li>
        <li>Div3</li>
        <li>Div4</li>
    </ul>
</div>
<div id="Div1">Div numero 1</div>
<div id="Div2">Div numero 2</div>

CSS

#Div1, #Div2 {
    display: none;
}

JavaScript

[1, 2].forEach(function (div) {
    $('li:contains(Div'+ div +')').on('click', function () {
        $('#Div'+ div +'').siblings(':not(#lista)').fadeOut('slow').queue(function () {
            $('#Div'+ div +'').fadeIn('slow');
            $(this).dequeue();
        });
    });
});