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56 lines
2.5 KiB
56 lines
2.5 KiB
3 years ago
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var global = require('../internals/global');
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var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;
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var createNonEnumerableProperty = require('../internals/create-non-enumerable-property');
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var redefine = require('../internals/redefine');
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var setGlobal = require('../internals/set-global');
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var copyConstructorProperties = require('../internals/copy-constructor-properties');
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var isForced = require('../internals/is-forced');
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/*
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options.target - name of the target object
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options.global - target is the global object
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options.stat - export as static methods of target
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options.proto - export as prototype methods of target
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options.real - real prototype method for the `pure` version
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options.forced - export even if the native feature is available
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options.bind - bind methods to the target, required for the `pure` version
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options.wrap - wrap constructors to preventing global pollution, required for the `pure` version
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options.unsafe - use the simple assignment of property instead of delete + defineProperty
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options.sham - add a flag to not completely full polyfills
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options.enumerable - export as enumerable property
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options.noTargetGet - prevent calling a getter on target
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options.name - the .name of the function if it does not match the key
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*/
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module.exports = function (options, source) {
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var TARGET = options.target;
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var GLOBAL = options.global;
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var STATIC = options.stat;
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var FORCED, target, key, targetProperty, sourceProperty, descriptor;
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if (GLOBAL) {
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target = global;
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} else if (STATIC) {
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target = global[TARGET] || setGlobal(TARGET, {});
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} else {
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target = (global[TARGET] || {}).prototype;
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}
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if (target) for (key in source) {
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sourceProperty = source[key];
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if (options.noTargetGet) {
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descriptor = getOwnPropertyDescriptor(target, key);
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targetProperty = descriptor && descriptor.value;
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} else targetProperty = target[key];
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FORCED = isForced(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
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// contained in target
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if (!FORCED && targetProperty !== undefined) {
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if (typeof sourceProperty == typeof targetProperty) continue;
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copyConstructorProperties(sourceProperty, targetProperty);
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}
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// add a flag to not completely full polyfills
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if (options.sham || (targetProperty && targetProperty.sham)) {
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createNonEnumerableProperty(sourceProperty, 'sham', true);
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}
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// extend global
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redefine(target, key, sourceProperty, options);
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}
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};
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