how to use the __definegetter__ function from date-fns in javascript

In date-fns library, the __defineGetter__ function can be used to create a getter function for a specific part of a date object, such as day or year. Here's an example of how to use this function:

index.tsx
const dateFns = require('date-fns');

// define a date object for 1st January 2022
const date = new Date('2022-01-01T00:00:00.000Z');

// use defineGetter function to create a getter for the day of the month
Object.defineProperty(Date.prototype, 'day', {
  get: dateFns.__defineGetter__('day')
});

console.log(date.day) // Output: 1
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In the code above, we first define a date object for 1st January 2022. Then we use the Object.defineProperty method to add a new property to the Date.prototype object called 'day'. The getter function for this property is created using the __defineGetter__ function, which takes a parameter that specifies the part of the date object that the getter will return.

Finally, we log the value returned by the getter function for the 'day' property, which should be 1 since the date object represents the first day of the month.

Note that this code will work with any part of the date object that is supported by the __defineGetter__ function, such as 'year', 'month', 'hours', 'minutes', 'seconds', or 'milliseconds'.