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