JSFiddle - React, Tailwind, and code Playground
HTML
<input type="text" class="form-control" placeholder="Search by Asset ID" maxlength="64" class="form-control" id="imageid" name="imageid">
JavaScript
var referrerURL = "http://subdomain.xxxxx.xxxxx.com/content/assets/750/blah";
$("#imageid").val(referrerURL.match(/\d+/));