How Do You Declare a Record Data Type?


Scott Campbell

When working with data in JavaScript, it is often necessary to define a specific structure for that data. This is where the record data type comes in handy.

A record is a composite data type that allows you to group related pieces of information together. In this tutorial, we will explore how to declare a record data type in JavaScript.

Declaring a Record Data Type

Before we dive into declaring a record data type, it is important to note that JavaScript does not have built-in support for records like some other programming languages do. However, we can simulate records using objects.

To declare a record-like object, you can use the following syntax:

const person = {
  name: "John Doe",
  age: 30,
  email: ""

In the example above, we have declared an object called person. This object represents a record with three fields: name, age, and email. The values assigned to these fields are “John Doe”, 30, and “” respectively.

Accessing Fields in a Record Data Type

To access individual fields within a record-like object, you can use dot notation:

// Output: "John Doe"

// Output: 30;
// Output: ""

In the example above, we access the name, age, and email fields of the person object using dot notation.

Nested Records

In JavaScript, you can also have nested records by defining objects within objects. This allows you to represent more complex data structures.

const employee = {
  name: "Jane Smith",
  age: 25,
  address: {
    street: "123 Main St",
    city: "New York",
    state: "NY"

In the example above, we have a record-like object called employee. It has three fields: name, age, and address. The value assigned to the address field is another object with its own fields: street,