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/**
* Promise.prototype.finally
*
* Pulled from https://github.com/domenic/promises-unwrapping/issues/18#issuecomment-57801572
* @author @stefanpenner, @matthew-andrews
*/
(function() {
// Get a handle on the global object
var local;
if (typeof global !== 'undefined') local = global;
else if (typeof window !== 'undefined' && window.document) local = window;
else local = self;
// It's replaced unconditionally to preserve the expected behavior
// in programs even if there's ever a native finally.
local.Promise.prototype['finally'] = function finallyPolyfill(callback) {
var constructor = this.constructor;
return this.then(function(value) {
return constructor.resolve(callback()).then(function() {
return value;
});
}, function(reason) {
return constructor.resolve(callback()).then(function() {
throw reason;
});
});
};
}());
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