JavaScript set()

Posted 2023-05-17 19:24:16

12K

In JavaScript, a setter can be used to execute a function whenever a specified property is attempted to be changed. Setters are most often used in conjunction with getters to create a type of pseudo-property. It is not possible to simultaneously have a setter on a property that holds an actual value.

Examples

Defining a setter on new objects in object initializers

The following example define a pseudo-property current of object language. When current is assigned a value, it updates log with that value:

const language = {
  set current(name) {
    this.log.push(name);
  },
  log: [],
};

language.current = "EN";
console.log(language.log); // ['EN']

language.current = "FA";
console.log(language.log); // ['EN', 'FA']

Note that current is not defined, and any attempts to access it will result in undefined.

Effettua l'accesso per mettere mi piace, condividere e commentare!

Marketing and Advertising

Is Radio Advertising Still Relevant in 2026? A Modern Marketing Perspective

With the rise of social media, streaming platforms, artificial intelligence, and immersive...

By 2026-02-10 22:11:34 0 6K

Business

How Much Does It Cost to Buy a Franchise?

A man once told me he bought a franchise because he was tired of uncertainty. Three years later,...

By 2026-05-29 17:24:22 0 4K

Business

How Do Onboarding and User Experience Impact Retention?

Retention is a key metric for any product or service. However, user retention doesn’t...

By 2025-09-16 16:35:18 0 11K

Business and Corporate Finance

What Is Business Finance? How Companies Manage Money

What Is Business Finance? How Companies Manage Money Introduction Every business, whether it is...

By 2025-12-27 22:39:19 0 8K

Business

What Are Home-Based Franchise Opportunities?

For decades, entrepreneurship came with a familiar image. A storefront. A lease agreement. A...

By 2026-06-04 00:37:13 0 2K