JSFiddle - React, Tailwind, and code Playground
HTML
<li id="li:90" class="liGrid" data-itemindex="3" data-itemid="li:90" >
winoria</li>
JavaScript
alert($('li[data-itemindex="3"]').text())
<li id="li:90" class="liGrid" data-itemindex="3" data-itemid="li:90" >
winoria</li>
alert($('li[data-itemindex="3"]').text())