JSFiddle - React, Tailwind, and code Playground
HTML
<span class="class">test</span>
CSS
$('span.class').attr('title','New Title');
JavaScript
$('span.class').attr('title','title'+' ');
<span class="class">test</span>
$('span.class').attr('title','New Title');
$('span.class').attr('title','title'+' ');