100 lines
3.6 KiB
Markdown
100 lines
3.6 KiB
Markdown
|
#object.getownpropertydescriptors <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
|
||
|
|
|
||
|
|
[![Build Status][travis-svg]][travis-url]
|
||
|
|
[![dependency status][deps-svg]][deps-url]
|
||
|
|
[![dev dependency status][dev-deps-svg]][dev-deps-url]
|
||
|
|
[![License][license-image]][license-url]
|
||
|
|
[![Downloads][downloads-image]][downloads-url]
|
||
|
|
|
||
|
|
[![npm badge][npm-badge-png]][package-url]
|
||
|
|
|
||
|
|
[![browser support][testling-svg]][testling-url]
|
||
|
|
|
||
|
|
An ES2017 spec-compliant shim for `Object.getOwnPropertyDescriptors` that works in ES5.
|
||
|
|
Invoke its "shim" method to shim `Object.getOwnPropertyDescriptors` if it is unavailable, and if `Object.getOwnPropertyDescriptor` is available.
|
||
|
|
|
||
|
|
This package implements the [es-shim API](https://github.com/es-shims/api) interface. It works in an ES3-supported environment and complies with the [spec](https://github.com/tc39/ecma262/pull/582).
|
||
|
|
|
||
|
|
## Example
|
||
|
|
|
||
|
|
```js
|
||
|
|
var getDescriptors = require('object.getownpropertydescriptors');
|
||
|
|
var assert = require('assert');
|
||
|
|
var obj = { normal: Infinity };
|
||
|
|
var enumDescriptor = {
|
||
|
|
enumerable: false,
|
||
|
|
writable: false,
|
||
|
|
configurable: true,
|
||
|
|
value: true
|
||
|
|
};
|
||
|
|
var writableDescriptor = {
|
||
|
|
enumerable: true,
|
||
|
|
writable: true,
|
||
|
|
configurable: true,
|
||
|
|
value: 42
|
||
|
|
};
|
||
|
|
var symbol = Symbol();
|
||
|
|
var symDescriptor = {
|
||
|
|
enumerable: true,
|
||
|
|
writable: true,
|
||
|
|
configurable: false,
|
||
|
|
value: [symbol]
|
||
|
|
};
|
||
|
|
|
||
|
|
Object.defineProperty(obj, 'enumerable', enumDescriptor);
|
||
|
|
Object.defineProperty(obj, 'writable', writableDescriptor);
|
||
|
|
Object.defineProperty(obj, 'symbol', symDescriptor);
|
||
|
|
|
||
|
|
var descriptors = getDescriptors(obj);
|
||
|
|
|
||
|
|
assert.deepEqual(descriptors, {
|
||
|
|
normal: {
|
||
|
|
enumerable: true,
|
||
|
|
writable: true,
|
||
|
|
configurable: true,
|
||
|
|
value: Infinity
|
||
|
|
},
|
||
|
|
enumerable: enumDescriptor,
|
||
|
|
writable: writableDescriptor,
|
||
|
|
symbol: symDescriptor
|
||
|
|
});
|
||
|
|
```
|
||
|
|
|
||
|
|
```js
|
||
|
|
var getDescriptors = require('object.getownpropertydescriptors');
|
||
|
|
var assert = require('assert');
|
||
|
|
/* when Object.getOwnPropertyDescriptors is not present */
|
||
|
|
delete Object.getOwnPropertyDescriptors;
|
||
|
|
var shimmedDescriptors = getDescriptors.shim();
|
||
|
|
assert.equal(shimmedDescriptors, getDescriptors);
|
||
|
|
assert.deepEqual(shimmedDescriptors(obj), getDescriptors(obj));
|
||
|
|
```
|
||
|
|
|
||
|
|
```js
|
||
|
|
var getDescriptors = require('object.getownpropertydescriptors');
|
||
|
|
var assert = require('assert');
|
||
|
|
/* when Object.getOwnPropertyDescriptors is present */
|
||
|
|
var shimmedDescriptors = getDescriptors.shim();
|
||
|
|
assert.notEqual(shimmedDescriptors, getDescriptors);
|
||
|
|
assert.deepEqual(shimmedDescriptors(obj), getDescriptors(obj));
|
||
|
|
```
|
||
|
|
|
||
|
|
## Tests
|
||
|
|
Simply clone the repo, `npm install`, and run `npm test`
|
||
|
|
|
||
|
|
[package-url]: https://npmjs.org/package/object.getownpropertydescriptors
|
||
|
|
[npm-version-svg]: http://versionbadg.es/ljharb/object.getownpropertydescriptors.svg
|
||
|
|
[travis-svg]: https://travis-ci.org/ljharb/object.getownpropertydescriptors.svg
|
||
|
|
[travis-url]: https://travis-ci.org/ljharb/object.getownpropertydescriptors
|
||
|
|
[deps-svg]: https://david-dm.org/ljharb/object.getownpropertydescriptors.svg
|
||
|
|
[deps-url]: https://david-dm.org/ljharb/object.getownpropertydescriptors
|
||
|
|
[dev-deps-svg]: https://david-dm.org/ljharb/object.getownpropertydescriptors/dev-status.svg
|
||
|
|
[dev-deps-url]: https://david-dm.org/ljharb/object.getownpropertydescriptors#info=devDependencies
|
||
|
|
[testling-svg]: https://ci.testling.com/ljharb/object.getownpropertydescriptors.png
|
||
|
|
[testling-url]: https://ci.testling.com/ljharb/object.getownpropertydescriptors
|
||
|
|
[npm-badge-png]: https://nodei.co/npm/object.getownpropertydescriptors.png?downloads=true&stars=true
|
||
|
|
[license-image]: http://img.shields.io/npm/l/object.getownpropertydescriptors.svg
|
||
|
|
[license-url]: LICENSE
|
||
|
|
[downloads-image]: http://img.shields.io/npm/dm/object.getownpropertydescriptors.svg
|
||
|
|
[downloads-url]: http://npm-stat.com/charts.html?package=object.getownpropertydescriptors
|