JSFiddle - React, Tailwind, and code Playground

HTML

<div class="selector"><strong>1)</strong>TEXT THAT I ONLY NEED<p>some par</p></div>

JavaScript

var complete_text = $('.selector').text();
var desired_text = complete_text.substr($('.selector strong').text().length, $('.selector').text().length - $('.selector p').text().length - $('.selector strong').text().length);

alert(desired_text);