isNativeFunction
Test if a value is a native function.
Native functions execute native code that is typically not written in JavaScript, but a lower-level language like C++. This includes the JavaScript built-in functions, functions implemented using Node.js C/C++ addons, and code compiled via WebAssembly.
Usage
var isNativeFunction = require( '@stdlib/assert/is-native-function' ); isNativeFunction( value )
Tests if a value is a native function.
var bool = isNativeFunction( Date ); // returns true function beep() { console.log( 'beep' ); } bool = isNativeFunction( beep ); // returns false Examples
var isNativeFunction = require( '@stdlib/assert/is-native-function' ); var bool = isNativeFunction( Math.sqrt ); // returns true bool = isNativeFunction( Date ); // returns true bool = isNativeFunction( RegExp ); // returns true bool = isNativeFunction( function foo() {} ); // returns false bool = isNativeFunction( 'beep' ); // returns false bool = isNativeFunction( 5 ); // returns false bool = isNativeFunction( true ); // returns false bool = isNativeFunction( null ); // returns false bool = isNativeFunction( [] ); // returns false bool = isNativeFunction( {} ); // returns false