minimal-polyfills/Object.assign.js

An ultra light-weight, nonexhaustive, polyfills library

"use strict";
exports.__esModule = true;
if (typeof Object.assign !== 'function') {
    // Must be writable: true, enumerable: false, configurable: true
    Object.defineProperty(Object, "assign", {
        value: function assign(target, _varArgs) {
            'use strict';
            if (target === null || target === undefined) {
                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 && nextSource !== undefined) {
                    for (var nextKey in nextSource) {
                        // Avoid bugs when hasOwnProperty is shadowed
                        if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
                            to[nextKey] = nextSource[nextKey];
                        }
                    }
                }
            }
            return to;
        },
        writable: true,
        configurable: true
    });
}
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