Create new method in function

Here is an example of how to create a new method in a function:

function myFunction() {
  // existing code here

  // create a new method
  this.myNewMethod = function() {
    console.log("Hello from my new method!");
  }
}

// call the new method
myFunction().myNewMethod(); // outputs "Hello from my new method!"

In this example, we define a function myFunction that has an existing code block. We then create a new method myNewMethod inside the function using the this keyword. The this keyword refers to the object that the function is called on, which in this case is the myFunction object.

We can then call the new method by accessing it as a property of the myFunction object, like this: myFunction().myNewMethod().

Alternatively, you can also define the new method as a separate function and then assign it to a property of the original function:

function myFunction() {
  // existing code here
}

myFunction.myNewMethod = function() {
  console.log("Hello from my new method!");
}

// call the new method
myFunction.myNewMethod(); // outputs "Hello from my new method!"

This approach is useful if you want to define the new method separately from the original function, or if you want to reuse the new method in other parts of your code.