JavaScript code to determine the correctness of input dates in two formats_javascript skills

The simplest

Copy code The code is as follows:

function isValidDate( dateStr) { 
 var matchArray = dateStr.match(/^[0-9] -[0-1][0-9]-[0-3][0-9]$/)
if ( matchArray == null) {
alert("Invalid date: " dateStr);
return false;
}
return true;
} }
function isValidDate(dateStr) {
var matchArray = dateStr.match(/^[0-9] -[0-1][0-9]-[0-3][0-9]$/)
if (matchArray == null) {
alert("Invalid date: " dateStr);
return false;
return true; }

Second type

Copy code The code is as follows: