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