<!-- @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. --> # hasProperty > Test if an object has a specified property, either own or inherited. <section class="usage"> ## Usage ```javascript var hasProp = require( '@stdlib/assert/has-property' ); ``` #### hasProp( value, property ) Returns a `boolean` indicating if a `value` has a specified `property`, either own or inherited. ```javascript var value = { 'beep': 'boop' }; var bool = hasProp( value, 'beep' ); // returns true bool = hasProp( value, 'hasOwnProperty' ); // returns true bool = hasProp( value, 'bap' ); // returns false ``` </section> <!-- /.usage --> <section class="notes"> ## Notes - The function does **not** throw when provided `null` or `undefined`. Instead, the function returns `false`. ```javascript var bool = hasProp( null, 'a' ); // returns false bool = hasProp( void 0, 'a' ); // returns false ``` - Value arguments other than `null` or `undefined` are coerced to `objects`. ```javascript var bool = hasProp( 'beep', 'length' ); // returns true ``` - Non-symbol property arguments are coerced to `strings`. ```javascript var value = { 'null': false }; var bool = hasProp( value, null ); // returns true value = { '[object Object]': false }; bool = hasProp( value, {} ); // returns true ``` </section> <!-- /.notes --> <section class="examples"> ## Examples <!-- eslint-disable object-curly-newline, object-curly-spacing --> <!-- eslint no-undef: "error" --> ```javascript var hasProp = require( '@stdlib/assert/has-property' ); var bool = hasProp( { 'a': 'b' }, 'a' ); // returns true bool = hasProp( {}, 'hasOwnProperty' ); // returns true bool = hasProp( { 'a': 'b' }, 'c' ); // returns false bool = hasProp( { 'a': 'b' }, null ); // returns false bool = hasProp( null, 'a' ); // returns false bool = hasProp( void 0, 'a' ); // returns false bool = hasProp( { 'null': false }, null ); // returns true bool = hasProp( { '[object Object]': false }, {} ); // returns true ``` </section> <!-- /.examples --> <section class="links"> </section> <!-- /.links -->