Javascript snippet to check duplicated ID in html page

checkDuplicateID

Select all below snippet => drag and drop in browser bookmark bar

=> click on bookmark which you have just add => check the browser console

javascript:(function(){var e={};$("[id]").each(function(){var t=$('[id="'+this.id+'"]');if(t.length>1&&t[0]===this){e.id=this.id;e.obj=this;e.obj2=t[0]}});console.warn("Duplicate ID:",e.id,e.obj,e.obj2)})();