stdlib-js
<summary>
About stdlib...
</summary>
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
getPrototypeOf
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Return the prototype of a provided object.
bash
npm install @stdlib/utils-get-prototype-of
javascript
var getPrototypeOf = require( '@stdlib/utils-get-prototype-of' );
#### getPrototypeOf( value )
Returns the prototype of an input value.
javascript
var proto = getPrototypeOf( {} );
// returns {}
Object.getPrototypeOf][object-get-prototype-of], this function does not throw when provided null or undefined. Instead, similar to when provided any value with no inherited properties, the function returns null.
javascript
var proto = getPrototypeOf( Object.create( null ) );
// returns null
proto = getPrototypeOf( null );
// returns null
proto = getPrototypeOf( void 0 );
// returns null
- Value arguments other than null or undefined are coerced to objects.
javascript
var proto = getPrototypeOf( 'beep' );
// returns String.prototype
proto = getPrototypeOf( 5 );
// returns Number.prototype
This behavior matches ES6/ES2015 native [Object.getPrototypeOf][object-get-prototype-of] behavior. In ES5, the native [Object.getPrototypeOf][object-get-prototype-of] throws when provided non-object values.
javascript
var getPrototypeOf = require( '@stdlib/utils-get-prototype-of' );
var proto = getPrototypeOf( 'beep' );
// returns String.prototype
proto = getPrototypeOf( 5 );
// returns Number.prototype
proto = getPrototypeOf( true );
// returns Boolean.prototype
proto = getPrototypeOf( null );
// returns null
proto = getPrototypeOf( void 0 );
// returns null
proto = getPrototypeOf( [] );
// returns Array.prototype
proto = getPrototypeOf( {} );
// returns {}
proto = getPrototypeOf( function foo() {} );
// returns Function.prototype
@stdlib/assert-is-prototype-of][@stdlib/assert/is-prototype-of]: test if an object's prototype chain contains a provided prototype.
