JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>This is text that contains some string bla This is text that contains</li>
    <li>some string bla This is text DELETEME some string bla This is text</li>
    <li>that contains some string bla This is text that contains some string</li>
    <li>bla</li>
</ul>

JavaScript

$('li:contains(DELETEME)').remove();