event when variable value changes javascript

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05 Jan 2019
1var obj = {
2  value: '',
3  letMeKnow() {
4    console.log(`The variable has changed to ${this.testVar}`);
5  },
6  get testVar() {
7    return this.value;
8  },
9  set testVar(value) {
10    this.value = value;
11    this.letMeKnow();
12  }
13}
14
15console.log(obj.testVar)
16
17obj.testVar = 5;
18console.log(obj.testVar)
19
20obj.testVar = 15;
21console.log(obj.testVar)
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