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@stdlib/assert-is-enumerable-property
Advanced tools
Test if an object's own property is enumerable.
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Test if an object's own property is enumerable.
npm install @stdlib/assert-is-enumerable-property
var isEnumerableProperty = require( '@stdlib/assert-is-enumerable-property' );
Returns a boolean
indicating if a value
has an enumerable property
.
var value = {
'beep': 'boop'
};
var bool = isEnumerableProperty( value, 'beep' );
// returns true
bool = isEnumerableProperty( value, 'constructor' );
// returns false
In contrast to the native Object.prototype.propertyIsEnumerable, this function does not throw when provided null
or undefined
. Instead, the function returns false
.
var bool = isEnumerableProperty( null, 'a' );
// returns false
bool = isEnumerableProperty( void 0, 'a' );
// returns false
Value arguments other than null
or undefined
are coerced to objects
.
var bool = isEnumerableProperty( 'beep', '1' );
// returns true
Property arguments are coerced to strings
.
var value = {
'null': false
};
var bool = isEnumerableProperty( value, null );
// returns true
value = {
'[object Object]': false
};
bool = isEnumerableProperty( value, {} );
// returns true
var isEnumerableProperty = require( '@stdlib/assert-is-enumerable-property' );
var bool = isEnumerableProperty( { 'a': 'b' }, 'a' );
// returns true
bool = isEnumerableProperty( [ 'a' ], 0 );
// returns true
bool = isEnumerableProperty( [ 'a' ], 'length' );
// returns false
bool = isEnumerableProperty( {}, 'toString' );
// returns false
bool = isEnumerableProperty( {}, 'hasOwnProperty' );
// returns false
bool = isEnumerableProperty( null, 'a' );
// returns false
bool = isEnumerableProperty( void 0, 'a' );
// returns false
bool = isEnumerableProperty( { 'null': false }, null );
// returns true
bool = isEnumerableProperty( { '[object Object]': false }, {} );
// returns true
@stdlib/assert-is-configurable-property
: test if an object's own property is configurable.@stdlib/assert-is-enumerable-property-in
: test if an object's own or inherited property is enumerable.@stdlib/assert-is-nonenumerable-property
: test if an object's own property is non-enumerable.@stdlib/assert-is-readable-property
: test if an object's own property is readable.@stdlib/assert-is-writable-property
: test if an object's own property is writable.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.
See LICENSE.
Copyright © 2016-2024. The Stdlib Authors.
0.2.2 (2024-07-27)
No changes reported for this release.
</section> <!-- /.release --> <section class="release" id="v0.2.1">FAQs
Test if an object's own property is enumerable.
The npm package @stdlib/assert-is-enumerable-property receives a total of 20,512 weekly downloads. As such, @stdlib/assert-is-enumerable-property popularity was classified as popular.
We found that @stdlib/assert-is-enumerable-property demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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