JSFiddle - React, Tailwind, and code Playground

HTML

<div id="issueDetailContainer">
        <div  id="issue_detail_first_row">
            <div>
                <div id="issue_detail_nav">
                    <div>test</div>
                    <div id="gett">
                        <div class="p1">
                            this content need to be deleted 1
                        </div>
                    </div>

                    <div class="p1">
                        this content need to be deleted 2
                    </div>

                </div>
            </div>                
        </div>
        <br/><br/><br/><br/>
<div id="sett">
</div>

JavaScript

var a =$("#issue_detail_first_row").html();
var jhtml =$(a)[0];   
$(jhtml).find('.p1').remove();

  alert($(jhtml).html());