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how to validate date input in javascript

Xenophobic Xenomorph answered on July 9, 2021 Popularity 1/10 Helpfulness 1/10

answer how to validate date input in javascript

how to validate date input in javascript

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function validatedate(inputText,DateFormat)
{
// format dd/mm/yyyy or in any order of (dd or mm or yyyy) you can write dd or mm or yyyy in first or second or third position ... or can be slash"/" or dot"." or dash"-" in the dates formats
var invalid = "";
var dt = "";
var mn = "";
var yr = "";
var k;
var delm = DateFormat.includes("/") ? "/" : ( DateFormat.includes("-") ? "-" : ( DateFormat.includes(".") ? "." : "" ) ) ;
var f1 = inputText.split(delm);
var f2 = DateFormat.split(delm);
for(k=0;k<=2;k++)
{ 
 dt = dt + (f2[parseInt(k)]=="dd" ? f1[parseInt(k)] : "");
 mn = mn + (f2[parseInt(k)]=="mm" ? f1[parseInt(k)] : "");
 yr = yr + (f2[parseInt(k)]=="yyyy" ? f1[parseInt(k)] : "");
}
var mn_days = "0-31-" + (yr % 4 == 0 ? 29 : 28) + "-31-30-31-30-31-31-30-31-30-31";
var days = mn_days.split("-");
if( f1.length!=3 || mn.length>2 || dt.length>2 || yr.length!=4 || !(parseInt(mn)>=1 && parseInt(mn)<=12) || !(parseInt(yr)>=parseInt(1900) && parseInt(yr)<=parseInt(2100)) || !(parseInt(dt)>=1 && parseInt(dt)<=parseInt(days[parseInt(mn)])) )
{
 invalid = "true";
}
alert( ( invalid=="true" ? "Invalid Date" : "Valid Date")  );
}

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: date input javascript

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Contributed on Jul 09 2021

Xenophobic Xenomorph

0 Answers Avg Quality 2/10

how to validate date input in javascript

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