JSFiddle - React, Tailwind, and code Playground

by webwakko

JavaScript

var values = [
    { name: 'someName1' },
    { name: 'other' },
    { name: 'notesame' },
    { name: 'someName1' }
];

var valueArr = values.map(function(item){ return item.name });
var isDuplicate = valueArr.some(function(item, idx){ 
    return valueArr.indexOf(item) != idx 
});
console.log(isDuplicate);