npm package: @fav/prop.assign-deep
Description: Copys enumerable own properties of child and descendants of source objects to destination object.
Author: Takayuki Sato
Latest version: 1.0.2

# [@fav/prop.assign-deep][repo-url] [![NPM][npm-img]][npm-url] [![MIT License][mit-img]][mit-url] [![Build Status][travis-img]][travis-url] [![Build Status][appveyor-img]][appveyor-url] [![Coverage status][coverage-img]][coverage-url]

Copys enumerable own properties of child and descendants of source objects to destination 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:

```sh
$ npm install --save @fav/prop.assign-deep
```

***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][repo-url], and move it in `node_modules/@fav/prop.assign-deep/` directory manually.*


## Usage

For Node.js:

```js
var assignDeep = require('@fav/prop.assign-deep');
assignDeep({ a: 1, b: { c: 1, d: 1 } }, { b: { c: 2, e: 2 }, f: 2 });
// => { a: 1, b: { c: 2, d: 1, e: 2 }, f: 2 }
```

For Web browsers:

```html
<script src="fav.prop.assign.min.js"></script>
<script>
var assignDeep = fav.prop.assignDeep;
assignDeep({ a: 1, b: { c: 1, d: 1 } }, { b: { c: 2, e: 2 }, f: 2 });
// => { a: 1, b: { c: 2, d: 1, e: 2 }, f: 2 }
</script>
```


## API

### <u>assignDeep(dest, [, ...srcs]) : object</u>

Copys all enumerable own properties deeply from one or more source objects to a destination object and returns a destination object.
This function copys not only child properties but also descendants properties of source objects.

***NOTE:*** *This function copys enumerable own properties of srcs objects (top level objects) like `Object.assign`, but copys properties of child and descendant objects (lower level objects) like primitive properties when those properties are not plain objects.
For example:*

```
var src = new function() {
  this.a = { b: 1 };
  this.c = new function() { this.d = 2 };
};
console.log(src); // => { a: { b: 1 }, c: { d: 2 } }

var dest = assignDeep({}, src);
console.log(dest); // => { a: { b: 1 }, c: { d: 2 } }

dest === src // => false
dest.a === src.a // => false
dest.c === src.c // => true
```

***NOTE:*** *If the first argument is nullish, this function replace it to an empty plain object. If properties of first argument object are read only, this function ignore them and doesn't throw Errors.*

#### Parameters:

| Parameter |   Type   | Description              |
|-----------|:--------:|--------------------------|
| *dest*    |  object  | The destination object.  |
| *srcs*    |  object  | The source object(s).    |

#### Returns:

The destination object.

**Type:** object


## Checked                                                                      
### Node.js (4〜)

| Platform  |   4    |   5    |   6    |   7    |   8    |   9    |   10   |
|:---------:|:------:|:------:|:------:|:------:|:------:|:------:|:------:|
| macOS     |&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|
| Windows10 |&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|
| Linux     |&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|

### io.js (1〜3)

| Platform  |   1    |   2    |   3    |
|:---------:|:------:|:------:|:------:|
| macOS     |&#x25ef;|&#x25ef;|&#x25ef;|
| Windows10 |&#x25ef;|&#x25ef;|&#x25ef;|
| Linux     |&#x25ef;|&#x25ef;|&#x25ef;|

### Node.js (〜0.12)

| Platform  |  0.8   |  0.9   |  0.10  |  0.11  |  0.12  |
|:---------:|:------:|:------:|:------:|:------:|:------:|
| macOS     |&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|
| Windows10 |&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|
| Linux     |&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|&#x25ef;|

### Web browsers

| Platform  | Chrome | Firefox | Vivaldi | Safari |  Edge  | IE11   |
|:---------:|:------:|:-------:|:-------:|:------:|:------:|:------:|
| macOS     |&#x25ef;|&#x25ef; |&#x25ef; |&#x25ef;|   --   |   --   |
| Windows10 |&#x25ef;|&#x25ef; |&#x25ef; |   --   |&#x25ef;|&#x25ef;|
| Linux     |&#x25ef;|&#x25ef; |&#x25ef; |   --   |   --   |   --   |


## License

Copyright (C) 2017-2018 Takayuki Sato

This program is free software under [MIT][mit-url] License.
See the file LICENSE in this distribution for more details.

[repo-url]: https://github.com/sttk/fav-prop.assign-deep/
[npm-img]: https://img.shields.io/badge/npm-v1.0.2-blue.svg
[npm-url]: https://www.npmjs.com/package/@fav/prop.assign-deep
[mit-img]: https://img.shields.io/badge/license-MIT-green.svg
[mit-url]: https://opensource.org/licenses/MIT
[travis-img]: https://travis-ci.org/sttk/fav-prop.assign-deep.svg?branch=master
[travis-url]: https://travis-ci.org/sttk/fav-prop.assign-deep
[appveyor-img]: https://ci.appveyor.com/api/projects/status/github/sttk/fav-prop.assign-deep?branch=master&svg=true
[appveyor-url]: https://ci.appveyor.com/project/sttk/fav-prop-assign-deep
[coverage-img]: https://coveralls.io/repos/github/sttk/fav-prop.assign-deep/badge.svg?branch=master
[coverage-url]: https://coveralls.io/github/sttk/fav-prop.assign-deep?branch=master