Node property validation function for date formatting

Developing Nodes
3

Thanks Nick - Your validate function snippet is very useful and makes the node more robust in handling bad input. I've incorporated it into my new node-red-contrib node.

defaults: {
        date: { value:0, required:true, validate: function(v) {
             if (!/^\d{8}/.test(v)) { return false; }
             var year = v.substring(0,4);
             var month = v.substring(4,6);
             var day = v.substring(6,8);
             // Date.parse will return NaN if this isn't a valid date
             var time = Date.parse(year+"-"+month+"-"+day);
             return !isNaN(time);
          }
        }
 }