generator-wxnode-boilerplate/node_boilerplate/templates/client/polyfill.ts

Yeoman generator for wxnode boilerplate

// Object.assign
/* tslint:disable */
if (typeof Object.assign !== 'function') {
    // Must be writable: true, enumerable: false, configurable: true
    Object.defineProperty(Object, 'assign', {
        value: function assign(target, varArgs) { // .length of function is 2
            'use strict';
            if (target == null) { // TypeError if undefined or null
                throw new TypeError('Cannot convert undefined or null to object');
            }

            const to = Object(target);

            for (let index = 1; index < arguments.length; index++) {
                const nextSource = arguments[index];

                if (nextSource != null) { // Skip over if undefined or null
                    for (const 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,
    });
}

// From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
if (!Object.keys) {
    Object.keys = (function() {
        'use strict';
        const hasOwnProperty = Object.prototype.hasOwnProperty,
            hasDontEnumBug = !({ toString: null }).propertyIsEnumerable('toString'),
            dontEnums = [
                'toString',
                'toLocaleString',
                'valueOf',
                'hasOwnProperty',
                'isPrototypeOf',
                'propertyIsEnumerable',
                'constructor',
            ],
            dontEnumsLength = dontEnums.length;

        return function(obj) {
            if (typeof obj !== 'function' && (typeof obj !== 'object' || obj === null)) {
                throw new TypeError('Object.keys called on non-object');
            }

            let result = [], prop, i;

            for (prop in obj) {
                if (hasOwnProperty.call(obj, prop)) {
                    result.push(prop);
                }
            }

            if (hasDontEnumBug) {
                for (i = 0; i < dontEnumsLength; i++) {
                    if (hasOwnProperty.call(obj, dontEnums[i])) {
                        result.push(dontEnums[i]);
                    }
                }
            }
            return result;
        };
    }());
}

// https://tc39.github.io/ecma262/#sec-array.prototype.find
if (!Array.prototype.find) {
    Object.defineProperty(Array.prototype, 'find', {
        value: function(predicate) {
            // 1. Let O be ? ToObject(this value).
            if (this == null) {
                throw new TypeError('"this" is null or not defined');
            }

            const o = Object(this);

            // 2. Let len be ? ToLength(? Get(O, "length")).
            const len = o.length >>> 0;

            // 3. If IsCallable(predicate) is false, throw a TypeError exception.
            if (typeof predicate !== 'function') {
                throw new TypeError('predicate must be a function');
            }

            // 4. If thisArg was supplied, let T be thisArg; else let T be undefined.
            const thisArg = arguments[1];

            // 5. Let k be 0.
            let k = 0;

            // 6. Repeat, while k < len
            while (k < len) {
                // a. Let Pk be ! ToString(k).
                // b. Let kValue be ? Get(O, Pk).
                // c. Let testResult be ToBoolean(? Call(predicate, T, « kValue, k, O »)).
                // d. If testResult is true, return kValue.
                const kValue = o[k];
                if (predicate.call(thisArg, kValue, k, o)) {
                    return kValue;
                }
                // e. Increase k by 1.
                k++;
            }

            // 7. Return undefined.
            return undefined;
        },
        configurable: true,
        writable: true,
    });
}

interface ObjectConstructor {
    values :(obj:any)=> any[];
}
if (!Object.values) Object.values = function(obj) {
    if (obj !== Object(obj))
        throw new TypeError('Object.values called on a non-object');
    let val = [], key;
    for (key in obj) {
        if (Object.prototype.hasOwnProperty.call(obj,key)) {
            val.push(obj[key]);
        }
    }
    return val;
};