JavaScript: Function.prototype
Function.prototype is the value of the property key "prototype" of the function Function. [see Function Object]
console.log(Function.hasOwnProperty("prototype"));
Type
Type of Function.prototype is function object.
console.log(typeof Function.prototype === "function");
Function.prototype(args) is not useful.
It takes any number of arguments, and always return undefined.
// Function.prototype() takes any arg, return undefined console.log(Function.prototype() === undefined); console.log(Function.prototype(3) === undefined); console.log(Function.prototype(3, 4) === undefined); console.log(Function.prototype({}) === undefined);
Parent
Parent of Function.prototype is Object.prototype
.
console.log(Reflect.getPrototypeOf(Function.prototype) === Object.prototype);
Purpose
Function.prototype is the parent of all function objects.
console.log(Reflect.getPrototypeOf(function f() {}) === Function.prototype); console.log(Reflect.getPrototypeOf((x) => 3) === Function.prototype);
[see Prototype and Inheritance]