Listening for variable changes in JavaScript

Question

Is it possible to have an event in JS that fires when the value of a certain variable changes? JQuery is accepted.

Answer 1

Easiest way I have found, starting from this answer:

// variable holding your data
const state = {
  count: null,
  update() {
    console.log(`this gets called and your value is ${this.pageNumber}`);
  },
  get pageNumber() {
    return this.count;
  },
  set pageNumber(pageNumber) {
    this.count = pageNumber;
    // here you call the code you need
    this.update(this.count);
  }
};

And then:

state.pageNumber = 0;
// watch the console

state.pageNumber = 15;
// watch the console