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!

Arts, Culture and Entertainment

Crescendo (2020)

An outwardly ambitious and charismatic opera singer fights to maintain her stature while silently...

By 2022-10-02 20:28:40 0 31K

Business

How Do I Determine if I Need a Co-Founder or Partner?

Launching a startup is an exciting yet daunting journey. One of the most pivotal early decisions...

By 2025-05-05 14:51:18 0 9K

Formazione

The Importance of Art Education: Nurturing Creativity and Innovation

Art education plays a significant role in the holistic development of individuals, fostering...

By 2025-01-24 18:13:07 0 12K

Family

What is family?

As dictionaries say, "the family is a small social group based on marriage, consanguinity or...

By 2023-01-21 18:52:22 0 25K

Alternative

Results of the second CAIPAN seminar from CNES

The second seminar of the French Space Agency (CNES) CAIPAN 2, held in Toulouse on October 13-14,...

By 2022-12-12 15:22:20 0 20K