JavaScript set()

Posté 2023-05-17 19:24:16

11KB

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.

Connectez-vous pour aimer, partager et commenter!

Marketing and Advertising

What Is the Cost of YouTube Marketing and How to Budget Effectively

Introduction Every business knows the power of video, but many hesitate to commit because...

Par 2025-11-13 17:17:13 0 3KB

Business

Marketing plan - types, development, examples

What is a marketing plan, what types does it include, how to develop and use it? In this article,...

Par 2024-09-05 17:23:09 0 12KB

Marketing and Advertising

What Warning Signs or Red Flags Should I Look for in an MLM?

Introduction Multilevel marketing (MLM) companies often present themselves as exciting...

Par 2025-10-21 15:19:20 0 4KB

Marketing and Advertising

What Education Did Famous Advertisers Have?

One of the most persistent questions among aspiring advertisers is whether formal education is...

Par 2026-01-08 12:08:24 0 207

Personal Finance

What is income-driven repayment (IDR)? Plan types, eligibility, and how payments are calculated

What is income-driven repayment (IDR)? Plan types, eligibility, and how payments are calculated...

Par 2025-12-16 21:03:59 0 1KB