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- 'use strict';
- var hasOwn = require('./internals/has-own-property');
- var isArray = require('./internals/is-array');
- var isForced = require('./internals/is-forced');
- var shared = require('./internals/shared-store');
-
- var data = isForced.data;
- var normalize = isForced.normalize;
- var USE_FUNCTION_CONSTRUCTOR = 'USE_FUNCTION_CONSTRUCTOR';
- var ASYNC_ITERATOR_PROTOTYPE = 'AsyncIteratorPrototype';
-
- var setAggressivenessLevel = function (object, constant) {
- if (isArray(object)) for (var i = 0; i < object.length; i++) data[normalize(object[i])] = constant;
- };
-
- module.exports = function (options) {
- if (typeof options == 'object') {
- setAggressivenessLevel(options.useNative, isForced.NATIVE);
- setAggressivenessLevel(options.usePolyfill, isForced.POLYFILL);
- setAggressivenessLevel(options.useFeatureDetection, null);
- if (hasOwn(options, USE_FUNCTION_CONSTRUCTOR)) {
- shared[USE_FUNCTION_CONSTRUCTOR] = !!options[USE_FUNCTION_CONSTRUCTOR];
- }
- if (hasOwn(options, ASYNC_ITERATOR_PROTOTYPE)) {
- shared[ASYNC_ITERATOR_PROTOTYPE] = options[ASYNC_ITERATOR_PROTOTYPE];
- }
- }
- };
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