JSFiddle - React, Tailwind, and code Playground

by Pavel Mareš

HTML

<div class="p-final-price-wrapper">
  <span class="price-save">
    <span></span>
    <span class="neco"></span>až -40%
  </span>
</div>

<div class="flags">
  <span class="price-save">
    <span></span>
    <span class="neco"></span>až -50%
  </span>
</div>

<div id="vysledek">x</div>

JavaScript

var string = document.querySelector( '.flags .price-save' ).innerHTML;
document.querySelector( '#vysledek' ).innerHTML = string.replace(/\D/g, '');