<!-- @license Apache-2.0 Copyright (c) 2018 The Stdlib Authors. 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. --> # Stream-like > Test if a value is Node [stream][nodejs-stream]-like. <section class="usage"> ## Usage ```javascript var isNodeStreamLike = require( '@stdlib/assert/is-node-stream-like' ); ``` #### isNodeStreamLike( value ) Tests if a `value` is Node [stream][nodejs-stream]-like. ```javascript var transformStream = require( '@stdlib/streams/node/transform' ); var bool = isNodeStreamLike( transformStream() ); // returns true ``` </section> <!-- /.usage --> <section class="notes"> </section> <!-- /.notes --> <section class="examples"> ## Examples <!-- eslint no-undef: "error" --> ```javascript var stream = require( 'stream' ); var transformStream = require( '@stdlib/streams/node/transform' ); var isNodeStreamLike = require( '@stdlib/assert/is-node-stream-like' ); var bool = isNodeStreamLike( new stream.Stream() ); // returns true bool = isNodeStreamLike( new stream.Readable() ); // returns true bool = isNodeStreamLike( new stream.Writable() ); // returns true bool = isNodeStreamLike( new stream.Duplex() ); // returns true bool = isNodeStreamLike( new stream.Transform() ); // returns true bool = isNodeStreamLike( transformStream() ); // returns true bool = isNodeStreamLike( {} ); // returns false bool = isNodeStreamLike( [] ); // returns false bool = isNodeStreamLike( null ); // returns false function Stream() { return this; } bool = isNodeStreamLike( Stream ); // returns false bool = isNodeStreamLike( new Stream() ); // returns false ``` </section> <!-- /.examples --> <section class="links"> [nodejs-stream]: https://nodejs.org/api/stream.html </section> <!-- /.links -->