125 lines
2.2 KiB
Markdown
125 lines
2.2 KiB
Markdown
<!--
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@license Apache-2.0
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Copyright (c) 2018 The Stdlib Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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# Prototypical Inheritance
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> Implement prototypical inheritance by replacing the prototype of one constructor with the prototype of another constructor.
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<section class="intro">
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</section>
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<!-- /.intro -->
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<section class="usage">
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## Usage
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```javascript
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var inherit = require( '@stdlib/utils/inherit' );
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```
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#### inherit( ctor, superCtor )
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Implements prototypical inheritance by replacing the prototype of one constructor with the prototype of another constructor.
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<!-- eslint-disable no-restricted-syntax -->
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```javascript
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function Foo() {
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return this;
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}
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Foo.prototype.beep = function beep() {
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return 'boop';
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};
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function Bar() {
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Foo.call( this );
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return this;
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}
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inherit( Bar, Foo );
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```
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</section>
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<!-- /.usage -->
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<section class="notes">
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## Notes
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- This function is not designed to work with ES2015/ES6 classes. For ES2015/ES6 classes, use `class` with `extends`.
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</section>
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<!-- /.notes -->
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<section class="examples">
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## Examples
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<!-- eslint-disable no-restricted-syntax -->
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<!-- eslint no-undef: "error" -->
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```javascript
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var inherit = require( '@stdlib/utils/inherit' );
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function Foo() {
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return this;
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}
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Foo.prototype = {};
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Foo.prototype.beep = function beep() {
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return 'boop';
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};
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function Bar() {
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Foo.call( this );
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this._super = Foo.prototype;
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return this;
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}
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// Set up prototypical inheritance:
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inherit( Bar, Foo );
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var bar = new Bar();
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var bool = ( bar instanceof Bar );
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// returns true
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bool = ( bar instanceof Foo );
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// returns true
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bool = bar.beep();
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// returns 'boop'
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```
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</section>
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<!-- /.examples -->
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<section class="links">
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</section>
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<!-- /.links -->
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