Q224: What are the advantages of Getters and Setters - JavaScript Internals (521 Qs)

Below are the list of benefits of Getters and Setters,

They provide simpler syntax
They are used for defining computed properties, or accessors in JS.
Useful to provide equivalence relation between properties and methods
They can provide better data quality
Useful for doing things behind the scenes with the encapsulated logic.

Practical Code Example

javascript

// Advantages of Getters & Setters:
// 1. Data Validation: Validate inputs before saving
// 2. Encapsulation: Compute virtual properties on the fly without breaking external API
class BankAccount {
  #balance = 0;

  get balance() { return this.#balance; }
  set balance(amount) {
    if (amount < 0) throw new Error('Balance cannot be negative');
    this.#balance = amount;
  }
}
const acc = new BankAccount();
acc.balance = 100;
console.log(acc.balance); // 100