JSFiddle - React, Tailwind, and code Playground

JavaScript

var arrayObjects = [{key1:'value',key2:'value2'},{key1:'value',key2:'value2'}]
    
    for(i = 0; i <arrayObjects.length; i++) {
    delete arrayObjects[i]['key1'] // Delete the Key's
     for(key in arrayObjects[i]) {
               alert(key);                                        
            }                                       
        }