124 lines
2.7 KiB
Markdown
124 lines
2.7 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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# isError
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> Test if a value is an [Error][mdn-error] object.
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<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
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<section class="intro">
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</section>
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<!-- /.intro -->
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<!-- Package usage documentation. -->
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<section class="usage">
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## Usage
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```javascript
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var isError = require( '@stdlib/assert/is-error' );
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```
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#### isError( value )
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Tests if a `value` is an [`Error`][mdn-error] object.
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```javascript
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var bool = isError( new Error( 'beep' ) );
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// returns true
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```
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</section>
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<!-- /.usage -->
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<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
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<section class="notes">
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</section>
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<!-- /.notes -->
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<!-- Package usage examples. -->
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<section class="examples">
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## Examples
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<!-- eslint no-undef: "error" -->
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```javascript
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var isError = require( '@stdlib/assert/is-error' );
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var bool = isError( new Error( 'error' ) );
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// returns true
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bool = isError( new EvalError( 'eval error' ) );
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// returns true
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bool = isError( new RangeError( 'range error' ) );
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// returns true
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bool = isError( new ReferenceError( 'reference error' ) );
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// returns true
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bool = isError( new SyntaxError( 'syntax error' ) );
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// returns true
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bool = isError( new TypeError( 'type error' ) );
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// returns true
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bool = isError( new URIError( 'URI error' ) );
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// returns true
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bool = isError( {} );
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// returns false
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bool = isError( null );
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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 to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
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<section class="references">
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</section>
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<!-- /.references -->
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<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
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<section class="links">
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[mdn-error]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error
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</section>
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<!-- /.links -->
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