JSFiddle - React, Tailwind, and code Playground

HTML

<ol id="target">
</ol>

JavaScript

var str = "<ol class=\"testClass\">" + 
    "<li>test1</li>" +
    "<li>testing2</li>" +
    "<li>testing3</li>" +
    "<li>testing4</li>" +
    "<li>testing5</li>" +
    "<li>testing6</li>" +
    "</ol>";

$(str).children("li").slice(0, 3).appendTo("#target");