JavaScript set()

Posted 2023-05-17 19:24:16

7KB

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!

Science Fiction and Fantasy

Jurassic Park Anthology. (1993-2019) all movies

Jurassic Park (1993) The head of the company "In-Gen", Professor John Hammond, finds a way to...

Von 2023-02-18 16:59:43 0 20KB

Illustration

The Art of Illustration: A Journey Through Visual Storytelling

Illustration is one of the most powerful forms of visual communication, blending artistry with...

Von 2024-11-20 16:36:14 0 5KB

Life Issues

Naked Weapon. (2002)

40 13 y.o. girls are kidnapped and the next 6 years forcefully trained to be sexy assassins. The...

Von 2023-05-17 20:27:00 0 25KB

Aviation

The fastest aircraft in the world and its competitors - How fast do they fly?

Modern aircraft are able to fly very fast. By "fast" I don't mean speeds 10 times faster than a...

Von 2022-10-25 11:02:46 0 18KB

Scouting

Exploring the World of Scouting: The Art of Recreation

Exploring the World of Scouting: The Art of Recreation Scouting, with its ethos of outdoor...

Von 2024-05-17 00:13:46 0 12KB