JavaScript set()

Posted 2023-05-17 19:24:16

10K

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!

Financial Services

Explicit and implicit costs and accounting and economic profit

Key points Privately owned firms are motivated to earn profits. Profit is the...

By 2023-07-17 19:32:29 0 14K

Социальные проблемы

Олдбой. Oldboy. (2003)

1988 год. Обыкновенный и ничем непримечательный бизнесмен О Дэ-cу в день трёхлетия дочери по пути...

By 2022-12-26 12:04:09 0 24K

Antiques

Antiques and Nobility

One of the most interesting definitions of antiques dates back to the end of the XIX century and...

By 2022-09-27 11:06:24 0 36K

Programming

Chrome Extensions Using Python

The idea is to compile Python to Javascript (technically a JS pre-compiler)...

By 2023-03-20 20:46:37 0 10K

Directorio

Casablanca. (1942)

A cynical expatriate American cafe owner struggles to decide whether or not to help his former...

By 2022-12-05 19:06:06 0 23K