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@stdlib/assert

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Standard assertion utilities.

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<!-- @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. --> # isDateObject > Test if a value is a [Date][mdn-date-object] object. <section class="usage"> ## Usage ```javascript var isDateObject = require( '@stdlib/assert/is-date-object' ); ``` #### isDateObject( value ) Tests if a value is a [`Date`][mdn-date-object] object. ```javascript var bool = isDateObject( new Date() ); // returns true bool = isDateObject( '2017-01-01' ); // returns false ``` </section> <!-- /.usage --> <section class="examples"> ## Examples <!-- eslint-disable no-empty-function, no-restricted-syntax --> <!-- eslint no-undef: "error" --> ```javascript var isDateObject = require( '@stdlib/assert/is-date-object' ); var bool = isDateObject( new Date() ); // returns true bool = isDateObject( '2017-01-01' ); // returns false bool = isDateObject( 5 ); // returns false bool = isDateObject( null ); // returns false bool = isDateObject( void 0 ); // returns false bool = isDateObject( {} ); // returns false bool = isDateObject( [] ); // returns false bool = isDateObject( function Date() {} ); // returns false ``` </section> <!-- /.examples --> <!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. --> <section class="related"> </section> <!-- /.related --> <!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. --> <section class="links"> [mdn-date-object]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date </section> <!-- /.links -->