jQuery Datepicker minDate is not working in bootstrap

In newer bootstrap datepicker version use below method

limiting end date **eg** +1d, +3m, +5y , -1d , -3m, -5y
limiting start date **eg**  +1d, -23d, +3m ,2y, -2y 
$('#dob').datepicker({
            fautoclose: true,
            startDate: '+1y',
   });

 $('#dob').datepicker({
            fautoclose: true,
            endDate: '-18y',
   });

For jquery datepicker use:

$(".datepicker").datepicker({
    minDate: 0
});

For Bootstrap versions use:

$(".datepicker").datepicker({
     startDate: new Date()
});

to disable past dates use startDate instead of minDate. like this...

$('#checkinDate').datepicker({
        format: "dd/mm/yyyy",
        autoclose: true,
        startDate: new Date()
    });