Package Exports

define-properties
define-properties/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (define-properties) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

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