JavaScript set()

Postado 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.

Faça Login para curtir, compartilhar e comentar!

Социальные проблемы

Удалить историю. Delete History. (2020)

Жизнь троих обитателей городка подчинена новейшим технологиям и опутана социальными сетями....

Por 2022-10-15 21:52:58 1 26K

Programming

Python ValueError

Python ValueError is raised when a function receives an argument of the correct type, but an...

Por 2023-03-27 22:06:51 0 11K

Business

What Were the Major Challenges They Faced, and How Did They Overcome Them?

Every successful leader has a story shaped not just by victories, but by the challenges they...

Por 2025-06-26 16:57:18 0 5K

Спорт

Дом на глубине. The Deep House. (2021)

Видеоблогеры Тина и Бен путешествуют по миру, снимая старые заброшенные здания. Решив впечатлить...

Por 2022-09-03 20:34:06 0 37K

Научная фантастика и фэнтези

Космическая одиссея 2001 года. 2001: A Space Odyssey. (1968)

Экипаж космического корабля «Дискавери» — капитаны Дэйв Боумэн, Фрэнк Пул и их...

Por 2023-01-10 11:12:11 0 34K