123 lines
2.3 KiB
Markdown
123 lines
2.3 KiB
Markdown
<!--
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@license Apache-2.0
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Copyright (c) 2018 The Stdlib Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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# isBuffer
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> Test if a value is a [Buffer][node-buffer] object.
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<section class="usage">
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## Usage
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```javascript
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var isBuffer = require( '@stdlib/assert/is-buffer' );
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```
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#### isBuffer( value )
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Tests if a `value` is a [`Buffer`][node-buffer] object.
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<!-- TODO: update once Buffer wrapper -->
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<!-- eslint-disable no-buffer-constructor -->
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```javascript
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var Buffer = require( '@stdlib/buffer/ctor' );
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var value = new Buffer( [ 1, 2, 3, 4 ] );
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var bool = isBuffer( value );
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// returns true
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```
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</section>
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<!-- /.usage -->
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<section class="notes">
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## Notes
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- The implementation supports both [Node.js][node-buffer] and [browser polyfill][browser-buffer] `Buffer` objects.
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</section>
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<!-- /.notes -->
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<section class="examples">
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## Examples
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<!-- TODO: update once Buffer wrapper -->
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<!-- eslint no-undef: "error" -->
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<!-- eslint-disable no-buffer-constructor, no-restricted-syntax, no-empty-function -->
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```javascript
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var Int8Array = require( '@stdlib/array/int8' );
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var Buffer = require( '@stdlib/buffer/ctor' );
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var isBuffer = require( '@stdlib/assert/is-buffer' );
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var bool = isBuffer( new Buffer( [ 1, 2, 3, 4 ] ) );
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// returns true
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bool = isBuffer( new Buffer( 'beep' ) );
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// returns true
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bool = isBuffer( [] );
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// returns false
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bool = isBuffer( {} );
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// returns false
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bool = isBuffer( new Int8Array() );
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// returns false
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bool = isBuffer( function foo() {} );
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// returns false
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bool = isBuffer( null );
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// returns false
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bool = isBuffer( void 0 );
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// returns false
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bool = isBuffer( 'beep' );
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// returns false
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bool = isBuffer( 5 );
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// returns false
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```
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</section>
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<!-- /.examples -->
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<section class="links">
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[node-buffer]: http://nodejs.org/api/buffer.html
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[browser-buffer]: https://github.com/feross/buffer
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</section>
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<!-- /.links -->
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