About stdlib...
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 or inherited property is writable.
npm install @stdlib/assert-is-writable-property-in
var isWritablePropertyIn = require( '@stdlib/assert-is-writable-property-in' );
Returns a boolean
indicating if a value
has a writable property
.
var defineProperty = require( '@stdlib/utils-define-property' );
var obj = {
'foo': 'bar'
};
defineProperty( obj, 'beep', {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'boop'
});
defineProperty( obj, 'setter', {
'configurable': false,
'enumerable': false,
'set': function setter( v ) {
obj.foo = v;
}
});
var bool = isWritablePropertyIn( obj, 'foo' );
// returns true
bool = isWritablePropertyIn( obj, 'setter' );
// returns true
bool = isWritablePropertyIn( obj, 'beep' );
// returns false
-
Value arguments other than
null
orundefined
are coerced toobjects
.var bool = isWritablePropertyIn( 'beep', 'toString' ); // returns true
-
Property arguments are coerced to
strings
.var obj = { 'null': 'foo' }; var bool = isWritablePropertyIn( obj, null ); // returns true
var isWritablePropertyIn = require( '@stdlib/assert-is-writable-property-in' );
var bool = isWritablePropertyIn( [ 'a' ], 'length' );
// returns true
bool = isWritablePropertyIn( { 'a': 'b' }, 'a' );
// returns true
bool = isWritablePropertyIn( [ 'a' ], 0 );
// returns true
bool = isWritablePropertyIn( { 'null': false }, null );
// returns true
bool = isWritablePropertyIn( { '[object Object]': false }, {} );
// returns true
bool = isWritablePropertyIn( {}, 'toString' );
// returns true
bool = isWritablePropertyIn( {}, 'hasOwnProperty' );
// returns true
bool = isWritablePropertyIn( null, 'a' );
// returns false
bool = isWritablePropertyIn( void 0, 'a' );
// returns false
-
@stdlib/assert-is-readable-property-in
: test if an object's own or inherited property is readable. -
@stdlib/assert-is-read-write-property-in
: test if an object's own and inherited property is readable and writable. -
@stdlib/assert-is-writable-property
: test if an object's own property is writable. -
@stdlib/assert-is-write-only-property-in
: test if an object's own or inherited property is write-only.
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.