`Object.defineProperties()`

Defines or modifies multiple properties on an object using descriptors.

Syntax

Object.defineProperties(obj, descriptors)

Name	Type	Required	Description
`obj`	`object`	Yes	The object on which to define the properties.
`descriptors`	`object`	Yes	An object whose keys are property names and values are property descriptors.

object — The object that was passed in.

const o = {};
Object.defineProperties(o, {
  a: { value: 1, enumerable: true },
  b: { value: 2 }
});
console.log(o.a, o.b, Object.keys(o));

Output

1 2 [ 'a' ]

const o = {};
Object.defineProperties(o, { x: { get: () => 9 } });
console.log(o.x);

Output

Equivalent to calling `Object.defineProperty` for each entry. Omitted attributes default to false. The descriptors object itself must be enumerable.