javascript implements date format conversion
- 2020-05-05 10:57:44
- OfStack
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title> Enter the date </title>
<script>
window.onload = function(){
var aLaydate = document.getElementsByClassName("date");
for(var i = 0;i < aLaydate.length;i ++)
{
aLaydate[i].onchange = function(){
var dateValue = this.value;
dateValue = dateValue.replace(/\ . /g,"-");
dateValue = dateValue.replace(/\./g,"-");
if(dateValue.length == 8){
var temp = dateValue.substring(0,4) + "-" + dateValue.substring(4,6) + "-" + dateValue.substring(6,8);
dateValue = temp;
console.log(dateValue);
}
if(CheckDT(dateValue)){
this.value = dateValue;
}
else
{
alert(" Date error ");
}
}
}
}
function CheckDT(str)
{
var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/);
if(r==null)
{
return false;
}
else
{
var d= new Date(r[1], r[3]-1, r[4]);
return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);
}
}
</script>
</head>
<body>
<input placeholder=" Please enter the date " class="date">
</body>
</html>
Enter YYYY.MM.DD, YYYY. MM. DD, YYYYMMDD to YYYY-MM-DD
CheckDT this function is found in baidu.
Very simple and practical functions, friends can be used directly.