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!

Social Issues

On the Waterfront. (1954)

An ex-prize fighter turned New Jersey longshoreman struggles to stand up to his corrupt union...

By 2023-03-23 20:11:02 0 24K

Социальные проблемы

Американская история Икс. American History X (1998)

Лидер местной банды скинхедов Дерек Виньярд прочно удерживает авторитет в своём районе....

By 2022-11-29 10:39:05 0 41K

Food and Related Products

Chocolate and its history

The history of chocolate began in Mesoamerica. Fermented beverages made from chocolate date back...

By 2023-05-20 19:46:42 0 31K

Business

How Do I Start My Own Business? A Step-by-Step Guide

Starting your own business can be one of the most rewarding decisions of your life. It offers the...

By 2025-03-12 14:46:33 0 9K

Television

UN press briefings. Live TV. USA.

The UN Web TV Channel is available 24 hours a day with selected live programming of United...

By 2022-10-12 19:01:24 0 28K