javascriptobjectpropertiesobject-propertiesobject-property

While using the Object.defineProperties in JavaScript I am getting as ' undefined' on newly defined property .How to fix it..?

const object1 = {
    firstName : 'Shashidhar',
    lastName : 'B M ',
    rollNo : 5678,
    rank : 23456

}

Object.defineProperties(object1,{
    property1 : {
    results : 'selected'
    }
});


console.log(object1.property1)
console.log(object1.firstName);

expected output

selected
shashidhar

actual output

undefined
shashidhar
Solution

  • You want value rather than results to specify the property's value:

    const object1 = {
    firstName : 'Shashidhar',
    lastName : 'B M ',
    rollNo : 5678,
    rank : 23456
}

Object.defineProperties(object1,{
    property1 : {
    value : 'selected'
    }
});


console.log(object1.property1)
console.log(object1.firstName);

    See the documentation on MDN.