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.

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

Travel

Top 5 Zoos

Top 5 best zoos in the worldNot only a child, but also an adult can be delighted with spending...

By 2023-05-06 17:56:31 0 26K

Hand-Eye Coordination

Modern children sit a lot:

Modern children sit a lot: in high chairs, car seats, strollers, at cartoons, tablets, lessons....

By 2024-04-04 21:08:04 0 16K

Mental Health

ADHD: Paradoxical reaction to neuroactive substances

Another sign of the structurally altered signal processing in the central nervous system in this...

By 2023-04-18 18:10:52 0 12K

Hand-Eye Coordination

Game: Coordination Challenge

Objective: The goal is to complete various mini-challenges inspired by popular games that...

By 2024-10-08 19:50:13 0 15K

Nature and Science

A Beautiful Mind. (2001)

After John Nash, a brilliant but asocial mathematician, accepts secret work in cryptography, his...

By 2023-02-17 16:55:42 0 37K