JavaScript set()

Posted 2023-05-17 19:24:16

11K

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.

Please log in to like, share and comment!

Personal Finance

How Salary Ranges Work: Minimum, Midpoint, Maximum, and Pay Bands

How Salary Ranges Work: Minimum, Midpoint, Maximum, and Pay Bands Salary ranges are one of the...

By 2025-11-28 20:56:15 0 3K

Kids and Teens

Navigating the Challenges: Understanding Teen Struggles in 2024

In the ever-evolving landscape of adolescence, the challenges facing teenagers in 2024 are as...

By 2024-04-29 13:01:04 0 18K

Marketing and Advertising

Best Practices for Effective Email Marketing in 2023 (and Beyond)

Introduction Email marketing is one of the most reliable and profitable digital marketing...

By 2025-10-03 20:40:07 0 6K

Money

What is APR on a Credit Card?

What is APR on a Credit Card? When you’re comparing credit cards, one of the most...

By 2025-09-20 15:30:19 0 2K

Programming

Encoding and Decoding Base64 Strings in Python

The Base64 encoding is used to convert bytes that have binary or text data into ASCII characters....

By 2023-03-10 20:59:12 0 14K