@fav/prop.enum-own-props

Lists enumerable own property keys and symbols of an object.

"fav" is an abbreviation of "favorite" and also the acronym of "for all versions". This package is intended to support all Node.js versions and many browsers as possible. At least, this package supports Node.js >= v0.10 and major Web browsers: Chrome, Firefox, IE11, Edge, Vivaldi and Safari.

Install

To install from npm:

$ npm install --save @fav/prop.enum-own-props

NOTE: npm < 2.7.0 does not support scoped package, but old version Node.js supports it. So when you use such older npm, you should download this package from github.com, and move it in node_modules/@fav/prop.enum-own-props/ directory manually.

Usage

For Node.js:

var enumOwnProps = require('@fav/prop.enum-own-props');

var symbol0 = Symbol('foo');
var symbol1 = Symbol('bar');

var obj = { a: 1 };
obj[symbol0] = 2;
Object.defineProperty(obj, 'b', { value: 3 });
Object.defineProperty(obj, symbol1, { value: 4 });

enumOwnProps(obj); // => ['a', Symbol(foo)]

function Fn() { this.a = 1; }
Fn.prototype.b = true;
Fn.prototype[symbol0] = false;
var fn = new Fn();
enumOwnProps(fn); // => ['a']

For Web browsers:

<script src="fav.prop.enum-own-props.min.js"></script>
<script>
var enumOwnProps = fav.prop.enumOwnProps;

var symbol0 = Symbol('foo');
var symbol1 = Symbol('bar');

var obj = { a: 1 };
obj[symbol0] = 2;
Object.defineProperty(obj, 'b', { value: 3 });
Object.defineProperty(obj, symbol1, { value: 4 });

enumOwnProps(obj); // => ['a', Symbol(foo)]
</script>

API

enumOwnProps(obj) : Array

Lists enumerable own property keys and symbols of the given object.

This funciton returns an empty array when the argument is nullish.

Parameter:

| Parameter | Type | Description | |-----------|:------:|--------------------------------------------------------| | obj | object | The object to be listed its property keys and symbols. |

Return:

An array of property keys and symbols.

Type: Array

Checked

Node.js (4〜)

| Platform | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |:---------:|:------:|:------:|:------:|:------:|:------:|:------:|:------:| | macOS |◯|◯|◯|◯|◯|◯|◯| | Windows10 |◯|◯|◯|◯|◯|◯|◯| | Linux |◯|◯|◯|◯|◯|◯|◯|

io.js (1〜3)

| Platform | 1 | 2 | 3 | |:---------:|:------:|:------:|:------:| | macOS |◯|◯|◯| | Windows10 |◯|◯|◯| | Linux |◯|◯|◯|

Node.js (〜0.12)

| Platform | 0.8 | 0.9 | 0.10 | 0.11 | 0.12 | |:---------:|:------:|:------:|:------:|:------:|:------:| | macOS |◯|◯|◯|◯|◯| | Windows10 |◯|◯|◯|◯|◯| | Linux |◯|◯|◯|◯|◯|

Web browsers

| Platform | Chrome | Firefox | Vivaldi | Safari | Edge | IE11 | |:---------:|:------:|:-------:|:-------:|:------:|:------:|:------:| | macOS |◯|◯ |◯ |◯| -- | -- | | Windows10 |◯|◯ |◯ | -- |◯|◯| | Linux |◯|◯ |◯ | -- | -- | -- |

License

Copyright (C) 2017-2018 Takayuki Sato

This program is free software under MIT License. See the file LICENSE in this distribution for more details.