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define-properties (1.2.1)

Published 2026-02-24 13:55:18 +00:00 by atheaadmin

Installation

Setup this registry in your project .npmrc file:

registry=

To install the package using npm, run the following command:

npm install define-properties@1.2.1

or add it to the package.json file:

"define-properties": "1.2.1"

For more information on the npm registry, see the documentation.

About this package

define-properties

Define multiple non-enumerable properties at once. Uses Object.defineProperty when available; falls back to standard assignment in older engines. Existing properties are not overridden. Accepts a map of property names to a predicate that, when true, force-overrides.

Example

var define = require('define-properties');
var assert = require('assert');

var obj = define({ a: 1, b: 2 }, {
	a: 10,
	b: 20,
	c: 30
});
assert(obj.a === 1);
assert(obj.b === 2);
assert(obj.c === 30);
if (define.supportsDescriptors) {
	assert.deepEqual(Object.keys(obj), ['a', 'b']);
	assert.deepEqual(Object.getOwnPropertyDescriptor(obj, 'c'), {
		configurable: true,
		enumerable: false,
		value: 30,
		writable: false
	});
}

Then, with predicates:

var define = require('define-properties');
var assert = require('assert');

var obj = define({ a: 1, b: 2, c: 3 }, {
	a: 10,
	b: 20,
	c: 30
}, {
	a: function () { return false; },
	b: function () { return true; }
});
assert(obj.a === 1);
assert(obj.b === 20);
assert(obj.c === 3);
if (define.supportsDescriptors) {
	assert.deepEqual(Object.keys(obj), ['a', 'c']);
	assert.deepEqual(Object.getOwnPropertyDescriptor(obj, 'b'), {
		configurable: true,
		enumerable: false,
		value: 20,
		writable: false
	});
}

Tests

Simply clone the repo, npm install, and run npm test

Dependencies

Dependencies

ID	Version
define-data-property	^1.0.1
has-property-descriptors	^1.0.0
object-keys	^1.1.1

Development Dependencies

ID	Version
@ljharb/eslint-config	^21.1.0
aud	^2.0.3
auto-changelog	^2.4.0
eslint	=8.8.0
in-publish	^2.0.1
npmignore	^0.3.0
nyc	^10.3.2
safe-publish-latest	^2.0.0
tape	^5.6.6

Keywords

Object.defineProperty Object.defineProperties object property descriptor descriptor define ES5

Details

npm

2026-02-24 13:55:18 +00:00

1

Jordan Harband

Project Site

MIT

latest

5.1 KiB

Assets (1)

define-properties-1.2.1.tgz 5.1 KiB

Versions (1) View all

1.2.1 2026-02-24