@stdlib/assert-is-configurable-property
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    0.0.6 • Public • Published

    isConfigurableProperty

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    Test if an object's own property is configurable.

    Installation

    npm install @stdlib/assert-is-configurable-property

    Usage

    var isConfigurableProperty = require( '@stdlib/assert-is-configurable-property' );

    isConfigurableProperty( value, property )

    Returns a boolean indicating if a value has a configurable property (i.e., a property which may be deleted or whose descriptor may be changed).

    var defineProperty = require( '@stdlib/utils-define-property' );
    
    var obj = {
        'foo': 'bar'
    };
    
    defineProperty( obj, 'beep', {
        'configurable': true,
        'enumerable': true,
        'writable': true,
        'value': true
    });
    
    defineProperty( obj, 'boop', {
        'configurable': false,
        'enumerable': true,
        'writable': true,
        'value': true
    });
    
    var bool = isConfigurableProperty( obj, 'foo' );
    // returns true
    
    bool = isConfigurableProperty( obj, 'beep' );
    // returns true
    
    bool = isConfigurableProperty( obj, 'boop' );
    // returns false

    Notes

    • Value arguments other than null or undefined are coerced to objects.

      var bool = isConfigurableProperty( 'beep', 'length' );
      // returns false
    • Property arguments are coerced to strings.

      var obj = {
          'null': 'foo'
      };
      
      var bool = isConfigurableProperty( obj, null );
      // returns true

    Examples

    var isConfigurableProperty = require( '@stdlib/assert-is-configurable-property' );
    
    var bool = isConfigurableProperty( { 'a': 'b' }, 'a' );
    // returns true
    
    bool = isConfigurableProperty( [ 'a' ], 0 );
    // returns true
    
    bool = isConfigurableProperty( { 'null': false }, null );
    // returns true
    
    bool = isConfigurableProperty( { '[object Object]': false }, {} );
    // returns true
    
    bool = isConfigurableProperty( [ 'a' ], 'length' );
    // returns false
    
    bool = isConfigurableProperty( {}, 'toString' );
    // returns false
    
    bool = isConfigurableProperty( {}, 'hasOwnProperty' );
    // returns false
    
    bool = isConfigurableProperty( null, 'a' );
    // returns false
    
    bool = isConfigurableProperty( void 0, 'a' );
    // returns false

    Notice

    This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

    For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

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    License

    See LICENSE.

    Copyright

    Copyright © 2016-2021. The Stdlib Authors.

    Install

    npm i @stdlib/assert-is-configurable-property

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    18

    Version

    0.0.6

    License

    Apache-2.0

    Unpacked Size

    37.6 kB

    Total Files

    9

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser