JSFiddle - React, Tailwind, and code Playground

by Matthew Vasallo

JavaScript

var array_person=document.getElementsByTagName('li');
console.log(arr);
var a=false;
var dupl=[];
for(var i=0;i<arr.length;i++){
    for(var j=i+1;j<arr.length;j++){
        if(arr[i].innerHTML===arr[j].innerHTML){
            //dupl=dupl+arr[i];
            alert("Found duplicate" + arr[i].innerHTML);
            a=true;
            return true;
        }
            
    }
   
        
}
if(a==false){
}