JSFiddle - React, Tailwind, and code Playground

HTML

<a href='#' class='gethash'>Get Hash Value</a>
<br /><br />
<input type='text' name='hashValue' id='hashValue'>

JavaScript

jQuery(document).ready(function(){
    jQuery('.gethash').click(function(event) {
        
        event.preventDefault();
        //var url = window.location.pathname;
        var url = "www.abc.com/mypage#yourId=ASDF2345";
        var hash = url.substring(url.indexOf('#')); // '#myValue'
        $("input#hashValue").val( hash );
        
        
    });
});