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.

Please log in to like, share and comment!

Business

How Often Should I Update My Business Biography?

A business biography serves as a personal and professional narrative that highlights the key...

By 2025-01-06 15:55:28 0 14K

Science Fiction and Fantasy

The Tomorrow War (2021)

A family man is drafted to fight in a future war where the fate of humanity relies on his ability...

By 2022-09-09 18:59:28 0 32K

Business

CEO vs. President: What's the Difference?

In the world of business leadership, the titles Chief Executive Officer (CEO) and President are...

By 2025-06-17 15:57:52 0 10K

Business

What Are Common Challenges Startups Face?

Starting a new business is an exciting venture, but it’s also filled with numerous...

By 2025-03-04 14:34:12 0 10K

Money

How to Get a Credit Card

How to Get a Credit Card Getting a credit card is an important financial step that can help you...

By 2025-09-20 16:30:05 0 7K