class-utils    

> Utils for working with JavaScript classes and prototype methods.

Please consider following this project's author, Jon Schlinkert, and consider starring the project to show your :heart: and support.

Install

Install with npm:

``sh
$ npm install --save class-utils
`

Usage

`js
var cu = require('class-utils');
`

API

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Returns true if an array has any of the given elements, or an object has any of the give keys.

Params

* obj {Object}
* val {String|Array}
* returns {Boolean}

Example

`js
cu.has(['a', 'b', 'c'], 'c');
//=> true

cu.has(['a', 'b', 'c'], ['c', 'z']);
//=> true

cu.has({a: 'b', c: 'd'}, ['c', 'z']);
//=> true
`

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Returns true if an array or object has all of the given values.

Params

* val {Object|Array}
* values {String|Array}
* returns {Boolean}

Example

`js
cu.hasAll(['a', 'b', 'c'], 'c');
//=> true

cu.hasAll(['a', 'b', 'c'], ['c', 'z']);
//=> false

cu.hasAll({a: 'b', c: 'd'}, ['c', 'z']);
//=> false
`

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Cast the given value to an array.

Params

* val {String|Array}
* returns {Array}

Example

`js
cu.arrayify('foo');
//=> ['foo']

cu.arrayify(['foo']);
//=> ['foo']
`

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Returns true if a value has a contructor

Params

* value {Object}
* returns {Boolean}

Example

`js
cu.hasConstructor({});
//=> true

cu.hasConstructor(Object.create(null));
//=> false
`

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Get the native ownPropertyNames from the constructor of the given object. An empty array is returned if the object does not have a constructor.

Params

* obj {Object}: Object that has a constructor.
* returns {Array}: Array of keys.

Example

`js
cu.nativeKeys({a: 'b', b: 'c', c: 'd'})
//=> ['a', 'b', 'c']

cu.nativeKeys(function(){})
//=> ['length', 'caller']
`

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Returns property descriptor key if it's an "own" property of the given object.

Params

* obj {Object}
* key {String}
* returns {Object}: Returns descriptor key

Example

`js
function App() {}
Object.defineProperty(App.prototype, 'count', {
get: function() {
return Object.keys(this).length;
}
});
cu.getDescriptor(App.prototype, 'count');
// returns:
// {
// get: [Function],
// set: undefined,
// enumerable: false,
// configurable: false
// }
`

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Copy a descriptor from one object to another.

Params

* receiver {Object}
* provider {Object}
* name {String}
* returns {Object}

Example

`js
function App() {}
Object.defineProperty(App.prototype, 'count', {
get: function() {
return Object.keys(this).length;
}
});
var obj = {};
cu.copyDescriptor(obj, App.prototype, 'count');
`

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Copy static properties, prototype properties, and descriptors
from one object to another.

Params

* receiver {Object}
* provider {Object}
* omit {String|Array}: One or more properties to omit
* returns {Object}

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Inherit the static properties, prototype properties, and descriptors
from of an object.

Params

* receiver {Object}
* provider {Object}
* omit {String|Array}: One or more properties to omit
* returns {Object}

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Returns a function for extending the static properties, prototype properties, and descriptors from the Parent constructor onto Child constructors.

Params

* Parent {Function}: Parent ctor
* extend {Function}: Optional extend function to handle custom extensions. Useful when updating methods that require a specific prototype.
* Child {Function}: Child ctor
* proto {Object}: Optionally pass additional prototype properties to inherit.
* returns {Object}

Example

`js
var extend = cu.extend(Parent);
Parent.extend(Child);

// optional methods
Parent.extend(Child, {
foo: function() {},
bar: function() {}
});
`

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Bubble up events emitted from static methods on the Parent ctor.

Params

* Parent {Object}
* events {Array}: Event names to bubble up

About

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You might also be interested in these projects:

* define-property: Define a non-enumerable property on an object. Uses Reflect.defineProperty when available, otherwise Object.defineProperty. | homepage
* delegate-properties: Deep-clone properties from one object to another and make them non-enumerable, or make existing properties… more | homepage
* is-descriptor: Returns true if a value has the characteristics of a valid JavaScript descriptor. Works for… more | homepage

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| Commits | Contributor |
| --- | --- |
| 34 | jonschlinkert |
| 8 | doowb |
| 2 | wtgtybhertgeghgtwtg |

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Jon Schlinkert

* linkedin/in/jonschlinkert
* github/jonschlinkert
* twitter/jonschlinkert

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Copyright © 2018, Jon Schlinkert.
Released under the MIT License.

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_This file was generated by verb-generate-readme, v0.6.0, on January 11, 2018._