JSFiddle - React, Tailwind, and code Playground

HTML

<div id = "parent_id">
  <div id = "id_1">
      <div id = "id_11"> test</div>
      <div id = "id_11">test </div>
  </div>
  <div id = "id_2"> test</div> 

  <div id = "id_n">id_n</div> 
</div>

JavaScript

$("#parent_id div[id!='id_n']").remove();