source: trip-planner-front/node_modules/define-properties/index.js@ 571e0df

'use strict';

var keys = require('object-keys');
var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';

var toStr = Object.prototype.toString;
var concat = Array.prototype.concat;
var origDefineProperty = Object.defineProperty;

var isFunction = function (fn) {
        return typeof fn === 'function' && toStr.call(fn) === '[object Function]';
};

var arePropertyDescriptorsSupported = function () {
        var obj = {};
        try {
                origDefineProperty(obj, 'x', { enumerable: false, value: obj });
                // eslint-disable-next-line no-unused-vars, no-restricted-syntax
                for (var _ in obj) { // jscs:ignore disallowUnusedVariables
                        return false;
                }
                return obj.x === obj;
        } catch (e) { /* this is IE 8. */
                return false;
        }
};
var supportsDescriptors = origDefineProperty && arePropertyDescriptorsSupported();

var defineProperty = function (object, name, value, predicate) {
        if (name in object && (!isFunction(predicate) || !predicate())) {
                return;
        }
        if (supportsDescriptors) {
                origDefineProperty(object, name, {
                        configurable: true,
                        enumerable: false,
                        value: value,
                        writable: true
                });
        } else {
                object[name] = value;
        }
};

var defineProperties = function (object, map) {
        var predicates = arguments.length > 2 ? arguments[2] : {};
        var props = keys(map);
        if (hasSymbols) {
                props = concat.call(props, Object.getOwnPropertySymbols(map));
        }
        for (var i = 0; i < props.length; i += 1) {
                defineProperty(object, props[i], map[props[i]], predicates[props[i]]);
        }
};

defineProperties.supportsDescriptors = !!supportsDescriptors;

module.exports = defineProperties;