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JavaScript Reflect ownKeys() Method

JavaScript Reflect ownKeys() Method with examples on javascript reflect methods, apply() construct(), defineProperty() method, deleteProperty(), get(), getOwnPropertyDescriptor(), getPrototypeOf(), has(), isExtensible(), ownKeys(), setPrototypeOf() etc.

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JavaScript Reflect.ownKeys() Method

The static Reflect.ownKeys() method returns an array whose values represents the keys of the properties of a provided object. It ignores the inherited properties.

Syntax:

Reflect.ownKeys(obj)

Parameters:

Obj: It is the target object from which to get the own keys.

Return value:

IT returns an Array of the target object's own property keys.

Exceptions:

A TypeError, if the target is not an Object.

Browser Support:

Chrome 49
Edge 12
Firefox 42
Opera 36

Example 1

const obj = {a: 5, b: 5};
console.log(Reflect.ownKeys(obj));
console.log(Object.keys(obj));

Output:

 ["a", "b"]
["a", "b"]

Example 2

const obj = {a: 5, b: 5};
const obj1 = {a: 5, b: 5, c:7};

console.log(Reflect.ownKeys(obj));	
console.log(Object.keys(obj1));
console.log(Reflect.ownKeys(obj1));

Output:

 ["a", "b"]
 ["a", "b", "c"]
 ["a", "b", "c"]

Example 3

var obj1 = Object.create({}, { hoo: { value: function() { return this.hoo; } } });
console.log(Object.keys(obj1)); 
console.log(Reflect.ownKeys(obj1));

Output:

  []
 ["hoo"]
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