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@stdlib/assert-is-enumerable-property
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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
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 © 2016-2021. The Stdlib Authors.
FAQs
Test if an object's own property is enumerable.
The npm package @stdlib/assert-is-enumerable-property receives a total of 17,681 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 4 open source maintainers collaborating on the project.
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