131 lines
2.8 KiB
Markdown
131 lines
2.8 KiB
Markdown
<!--
|
|
|
|
@license Apache-2.0
|
|
|
|
Copyright (c) 2018 The Stdlib Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
|
|
-->
|
|
|
|
# inheritedProperties
|
|
|
|
> Return an array of an object's inherited property names and [symbols][@stdlib/symbol/ctor].
|
|
|
|
<section class="usage">
|
|
|
|
## Usage
|
|
|
|
```javascript
|
|
var inheritedProperties = require( '@stdlib/utils/inherited-properties' );
|
|
```
|
|
|
|
#### inheritedProperties( obj\[, level] )
|
|
|
|
Returns an `array` of an object's inherited property names and [symbols][@stdlib/symbol/ctor].
|
|
|
|
```javascript
|
|
var props = inheritedProperties( [ 1, 2, 3 ] );
|
|
// returns [...]
|
|
```
|
|
|
|
By default, the function walks an object's entire prototype chain. To limit the inheritance level, provide a `level` argument.
|
|
|
|
```javascript
|
|
var props = inheritedProperties( [ 1, 2, 3 ], 1 );
|
|
```
|
|
|
|
</section>
|
|
|
|
<!-- /.usage -->
|
|
|
|
<section class="notes">
|
|
|
|
</section>
|
|
|
|
<!-- /.notes -->
|
|
|
|
<section class="examples">
|
|
|
|
## Examples
|
|
|
|
<!-- eslint no-undef: "error" -->
|
|
|
|
```javascript
|
|
var hasSymbolSupport = require( '@stdlib/assert/has-symbol-support' );
|
|
var Symbol = require( '@stdlib/symbol/ctor' );
|
|
var defineProperty = require( '@stdlib/utils/define-property' );
|
|
var inheritedProperties = require( '@stdlib/utils/inherited-properties' );
|
|
|
|
var hasSymbols;
|
|
var props;
|
|
var obj;
|
|
|
|
hasSymbols = hasSymbolSupport();
|
|
|
|
function Foo() {
|
|
this.a = 'b';
|
|
defineProperty( this, 'foo', {
|
|
'configurable': false,
|
|
'enumerable': false,
|
|
'writable': false,
|
|
'value': 'bar'
|
|
});
|
|
if ( hasSymbols ) {
|
|
this[ Symbol( 'a' ) ] = 'b';
|
|
defineProperty( this, 'beep', {
|
|
'configurable': false,
|
|
'enumerable': false,
|
|
'writable': false,
|
|
'value': 'boop'
|
|
});
|
|
}
|
|
return this;
|
|
}
|
|
|
|
Foo.prototype.c = 'd';
|
|
defineProperty( Foo.prototype, 'bip', {
|
|
'configurable': false,
|
|
'enumerable': false,
|
|
'writable': false,
|
|
'value': 'bap'
|
|
});
|
|
if ( hasSymbols ) {
|
|
Foo.prototype[ Symbol( 'c' ) ] = 'd';
|
|
defineProperty( Foo.prototype, Symbol( 'e' ), {
|
|
'configurable': false,
|
|
'enumerable': false,
|
|
'writable': false,
|
|
'value': 'f'
|
|
});
|
|
}
|
|
|
|
obj = new Foo();
|
|
props = inheritedProperties( obj );
|
|
|
|
console.log( props );
|
|
// => [ ..., 'c', 'bip', ... ]
|
|
```
|
|
|
|
</section>
|
|
|
|
<!-- /.examples -->
|
|
|
|
<section class="links">
|
|
|
|
[@stdlib/symbol/ctor]: https://www.npmjs.com/package/@stdlib/symbol-ctor
|
|
|
|
</section>
|
|
|
|
<!-- /.links -->
|