JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
        <li id="eup">....</li>
        <li id="1">a</li>
        <li id="2">b</li>
        <li id="3">c</li>
        <li id="4">d</li>
        <li id="5">e</li>
        <li id="ebtm">....</li>
    </ul>

JavaScript

$(function() {
    var $start = $("#3");
    var $end = $("#5");
    $start.nextUntil("#5").add($start).add($end).remove();
});