spaceout/site/frontend/node_modules/indefinite-observable/dist/wrapWithObserver.js

35 lines
1.2 KiB
JavaScript

/** @license
* Copyright 2016 - present The Material Motion Authors. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
/**
* TypeScript is a pain to use with polymorphic types unless you wrap them in a
* function that returns a single type. So, that's what this is.
*
* If you give it an observer, you get back that observer. If you give it an
* anonymous function, you get back that anonymous function wrapped in an
* observer.
*/
export function wrapWithObserver(listener) {
if (typeof listener === 'function') {
return {
next: listener
};
}
else {
return listener;
}
}
export default wrapWithObserver;
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