Tag: javascript object properties iterate

Property Management Methods

// Adding or changing an object property
Object.defineProperty(object, property, descriptor)

// Adding or changing object properties
Object.defineProperties(object, descriptors)

// Accessing a Property
Object.getOwnPropertyDescriptor(object, property)

// Accessing Properties
Object.getOwnPropertyDescriptors(object)

// Returns all properties as an array
Object.getOwnPropertyNames(object)

// Accessing the prototype
Object.getPrototypeOf(object)

JavaScript Object.defineProperty()

The Object.defineProperty() method can be used to:

• Adding a new property to an object
• Changing property values
• Changing property metadata
• Changing object getters and setters

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Accessing JavaScript Properties

The syntax for accessing the property of an object is:

// objectName.property
let age = person.age;

or

//objectName["property"]
let age = person["age"];

or

//objectName[expression]
let age = person[x];

person.firstname + " is " + person.age + " years old.";
person["firstname"] + " is " + person["age"] + " years old.";
let x = "firstname";
let y = "age";
person[x] + " is " + person[y] + " years old.";

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