javascript - How to check whether the date is in past or not?and How to get difference between two dates? by input tag type date and type time -
restaurant app booking table feature.
date input <input type="date"> , <input type="time">
what need.
1.how check whether given/input date , time in past or not.if past not valid,if future valid booking.
2.how difference between 2 dates , times.so can show time left booked table,and user allowed table within booked date , time mentioned.(may setinterval())
html
<html> <head> </head> <body> <table id="tdatetime"> <tr><td>select date</td><td>select time</td></tr> <tr><td><input type="date" id="bdate"></td><td><input type="time" id="btime"></td></tr> </table> <input type="button" id="bdtbtn" onclick="getbdtrl(this)" value="book now"></input> </body> </html> js
function getbdtrl(bookbtn) { var bdate=$("#bdate").val(); var btime=$("#btime").val(); var = new date(); var selecteddate=new date(bdate); var selectedtime=new date(btime); alert(btime);//returns example- 2:00 alert(selectedtime);//returns invalid date alert(selectedtime.tostring());//returns invalid date alert(selectedtime.totimestring());//returns invalid date alert(selectedtime.todatestring());//returns invalid date //date check working if(selecteddate<now) { alert("selected date in past"); } else if(selecteddate>now) { alert("selected date in future"); } else if(selecteddate==now) { alert("selected date in present"); } //time check not working selectedtime if(selectedtime<now) { alert("selected time in past"); } else if(selectedtime>now) { alert("selected time in future"); } else if(selectedtime==now) { alert("selected time in present"); } //time check not working btime if(btime<now) { alert("selected time in past"); } else if(btime>now) { alert("selected time in future"); } else if(btime==now) { alert("selected time in present"); } } //date , time difference not working var date=new date(); var tempdate="2015-05-01"; var d1 = date;//tempdate;// //alert("current date d1="+d1); var d2 = rlarrbookdatesender;//receiving db2 database data type time booked //alert("booked date d2="+d2); var datediff = { indays: function(d1,d2) { var t2 = d2.gettime(); var t1 = d1.gettime(); return parseint((t2-t1)/(24*3600*1000)); } }; alert("diff="+datediff.indays(d1,d2));//no alert executes
i apologize if looking more answer...but if following right should make sense...
(it's late, believe logic right...)
to compare dates:
var = new date(); var selectdate = new date(bdate); var diff = now.gettime() - selectdate.gettime(); if(diff > 0 || diff == 0) { // selected date in past or our current time // (which should tough match down milliseconds) } else if (diff < 0) { // selected date has not past } to time left until future date:
var = new date(); var validfuturedate = new date(bdate); var diff = validfuturedate.gettime() - now.gettime(); // in milliseconds var daydiff = parseint(diff/(1000*60*60*24));
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