Security News
Namecheap Takes Down Polyfill.io Service Following Supply Chain Attack
Polyfill.io has been serving malware for months via its CDN, after the project's open source maintainer sold the service to a company based in China.
@stdlib/assert-has-own-property
Advanced tools
Readme
Test if an object has a specified property.
npm install @stdlib/assert-has-own-property
var hasOwnProp = require( '@stdlib/assert-has-own-property' );
Returns a boolean
indicating if a value
has a specified property
.
var value = {
'beep': 'boop'
};
var bool = hasOwnProp( value, 'beep' );
// returns true
bool = hasOwnProp( value, 'bap' );
// returns false
In contrast to the native Object.prototype.hasOwnProperty, this function does not throw when provided null
or undefined
. Instead, the function returns false
.
var bool = hasOwnProp( null, 'a' );
// returns false
bool = hasOwnProp( void 0, 'a' );
// returns false
Value arguments other than null
or undefined
are coerced to objects
.
var bool = hasOwnProp( 'beep', 'length' );
// returns true
Property arguments are coerced to strings
.
var value = {
'null': false
};
var bool = hasOwnProp( value, null );
// returns true
value = {
'[object Object]': false
};
bool = hasOwnProp( value, {} );
// returns true
var hasOwnProp = require( '@stdlib/assert-has-own-property' );
var bool = hasOwnProp( { 'a': 'b' }, 'a' );
// returns true
bool = hasOwnProp( { 'a': 'b' }, 'c' );
// returns false
bool = hasOwnProp( { 'a': 'b' }, null );
// returns false
bool = hasOwnProp( {}, 'hasOwnProperty' );
// returns false
bool = hasOwnProp( null, 'a' );
// returns false
bool = hasOwnProp( void 0, 'a' );
// returns false
bool = hasOwnProp( { 'null': false }, null );
// returns true
bool = hasOwnProp( { '[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 has a specified property.
The npm package @stdlib/assert-has-own-property receives a total of 533,445 weekly downloads. As such, @stdlib/assert-has-own-property popularity was classified as popular.
We found that @stdlib/assert-has-own-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.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Polyfill.io has been serving malware for months via its CDN, after the project's open source maintainer sold the service to a company based in China.
Security News
OpenSSF is warning open source maintainers to stay vigilant against reputation farming on GitHub, where users artificially inflate their status by manipulating interactions on closed issues and PRs.
Security News
A JavaScript library maintainer is under fire after merging a controversial PR to support legacy versions of Node.js.