JavaScript set()

Posted 2023-05-17 19:24:16

12K

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!

Decision Making and Problem Solving

Can screen time affect memory?

The mind is not a warehouse, and it is certainly not a hard drive. We operate under the...

By 2026-07-12 21:59:41 0 950

Business

What Is the Best Niche for a Membership Business?

It's one of the most common questions aspiring membership entrepreneurs ask. "What's the best...

By 2026-06-26 20:14:03 0 2K

Социальные проблемы

Новые времена. Modern Times. (1936)

«Новые времена» - это эмоциональный, выдержанный в комическом ключе, отклик на...

By 2022-12-06 22:41:12 0 32K

Business

What Should a Presentation Include?

A well-structured presentation isn’t just about attractive slides — it’s about...

By 2025-12-04 16:24:25 0 6K

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 20K