JavaScript gets the first day of last month/last day example

Directly on JavaScript gets the source code for the first day of the last month:

Get the first day of the month

The code is as follows
function Getlastmonthfirst () { return new Date (Getcurrentmonthfirst (). Setmonth (Getcurrentmonthfirst (). getmonth ()-1)); }

function returns a date-type value that can be used to calculate a date or format the output.

Last day of last month

The code is as follows
function Getlastmonthlast () { return new Date (Getcurrentmonthfirst (). Setdate (Getcurrentmonthfirst (). GetDate ()-1)); }

function returns a date-type value that can be used to calculate a date or format the output.