JSFiddle - React, Tailwind, and code Playground

by prozoroff

JavaScript

function extend(a, b, properties) {
        if (properties) {
            for (var key in properties) {
                if (b.hasOwnProperty(key))
                    a[properties[key]] = b[key];
            }
        }
        else {
            for (var key in b) {
                if (b.hasOwnProperty(key))
                    a[key] = b[key];
            }
        }
        return a;
    }
    
    
    alert(extend({a:123},{a:234}).a)