cc.fovea.cordova.purchase/src/js/polyfills.js

Cordova Purchase plugin for iOS, Android, Windows (AppStore, Play, UWP)

// Add a polyfill for Object.assign in case it isn't supported (which is the case
// on Android < 4.4), see https://github.com/auth0/auth0-cordova/issues/46 for reference
if (typeof Object.assign != 'function') {
    Object.assign = function (target, varArgs) {
        'use strict';
        if (target == null) {
            throw new TypeError('Cannot convert undefined or null to object');
        }
        var to = Object(target);
        for (var index = 1; index < arguments.length; index++) {
            var nextSource = arguments[index];

            if (nextSource != null) {
                for (var nextKey in nextSource) {
                    if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
                        to[nextKey] = nextSource[nextKey];
                    }
                }
            }
        }
        return to;
    };
}