JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
	<div id="el1">Remove</div>
	<div id="el2">Remove</div>
	<div id="el3">Remove</div>
	<div id="el4">Remove</div>
	<script type="text/javascript">
    // Keep
	</script>
	<div id="lastEl">Keep</div>
</div>

JavaScript

(function ($) {
		var script = $('#container').children('#lastEl').prev();
    // This returns a script. Everything before this needs to be removed
    
    console.log(script)
	}(jQuery));