JavaScript Reflect has() Method

JavaScript Reflect.has() Method

The static Reflect.has() method is used to check if a property exists in an object. It works like the in operator as a function.

target: It is the object in which to look for the property.

propertyKey: It is the name of the property to check.

It returns a Boolean which indicates whether or not the target has the property.

A TypeError, if the target is not an Object.

  const object1 = {    property1: 42  };  console.log(Reflect.has(object1, ‘property1’));  

Output:

 true

  const object1 = {    property1: 42  };  console.log(Reflect.has(object1, ‘property2’));  

Output:

 false

  var x = { foo: 1 };  console.log(Reflect.has(x, ‘foo’));  console.log(‘foo’ in x);  console.log(Reflect.has(x, ‘bar’));  console.log(‘bar’ in x);  

Output:

true  true  false    false