Getting an error while using Object.defineProperty() method to add getters and setters to an already existing object

Question

Error: Uncaught TypeError property description must be an object : h

Getting an above error while using Object.defineProperty() method to add setters and getters to an already existing object to modify values of property in a object.

const jump = {
height: "10:00mtr",
time: "10seconds",
    
}

//adding a setters and getters to height.
Object.defineProperties(jump, "height2", {
        get: function () {
            return this.height;
        },
        set: function (newHeight) {
            return this.height = newHeight;
    },
});

//adding a setters and getters to time.
Object.defineProperties(jump, "time2", {
    get: function () {
        return this.time;
    },
    set: function (newTime) {
        return this.time = newTime;
    }

});

Answer 1

This particular syntax you use is reserved to Object.defineProperty rather than Object.defineProperties. Your only mistake is then using Object.defineProperties where you was supposed to use Object.defineProperty.

Even in your question title you ask about Object.defineProperty but still you use Object.defineProperties in the code below.

Corrected code:

Object.defineProperty(jump, "height2", {
    get: function () {
        return this.height;
    },
    set: function (newHeight) {
        return this.height = newHeight;
    },
});

On the other hand, Object.defineProperties is used to define multiple propeties at once and should be used like this:

Object.defineProperties(jump, 
  {
    "height2": 
    {
      get: function () {
          return this.height;
      },
      set: function (newHeight) {
          return this.height = newHeight;
      }
    },
    "anotherProperty: 
    {
      ...
    }
  });