JSFiddle - React, Tailwind, and code Playground

HTML

<ul><li>abc</li><li>def</li></ul>

CSS

ul li {
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}