Explanation:
filter Function: The filter option in the datepicker plugin allows you to provide a function that determines whether a specific date should be enabled. The function receives the date as a parameter and should return true for valid dates and false for invalid ones.
Day Mapping: The getDay() method of the Date object is used to get the day of the week (0 for Sunday through 6 for Saturday).
Allowed Days: The code checks if the day is between 1 (Monday) and 4 (Thursday). Only these days are allowed.
This will ensure that users can only pick dates that fall on Monday, Tuesday, Wednesday, or Thursday, while all other dates will be disabled.
