Get Field to Remain Blank Until User Enters Value in Previous Field Used in Calculation

Hello - I am trying to auto populate the week ending date which is Sundays based on the work date that my tech inputs into the PDF Form that I have created. Sunday is our weekending date. How can I do this PDF Forms? I see several tutorials, but I am not all that skilled in code and I am having a hard time figuring it out. Please help.

Have you opened the Acrobat JavaScript console to see if you have any errors?

Not getting a pop message is far from having the correct code.

Have you tried to see what the value of the "Desired Start Date is?

The field is not a numeric value since it most likely will contain  some type of separator like "/", "-" , ".", or space. It is a text field. Empty text fields have a length of 0 or a value of the null string, "". I would test for one of those properties. The only exception I could think of would be if you entered the number of milliseconds since the Epoch date, January 1, 1970 at midnight.

You can use the JavaScript console to access various variables, objects or values either through code or by direct entry into the console.

Try the following code to see more information about your code:

console.show();
console.clear();
//if field “Desired Start Date” is empty, leave “to” field blank
var myStartDate = new Date(this.getField("Desired Effective Date").value);
if(myStartDate == null) console.println("error in date value converstion");
console.println("myStartDate :" + myStartDate);
console.println("typeof myStartDate: " + (typeof myStartDate));
console.println("lenght of myStartDate: " + myStartDate.length);
console.println("field myStartDate value: " + this.getField("myStartDate").valueAsString);
console.println("typeof field myStartDate value: " + (typeof this.getField("myStartDate").valueAsString));
console.println("length of field myStartDate : " + this.getField("myStartDate").valueAsString.length);

if ( ((myStartDate == 0) && (this.getField("myStartDate").valueAsString === "") ))
{
event.value = "";
//if field “Desired Start Date” has a date entered, use the date to calculate one year from date entered.
}
else {this.getField("to").value = util.printd("mm/dd/yyyy", new Date(myStartDate.getFullYear()+1,myStartDate.getMonth(),myStartDate.getDate()))
}
// converting date string to date object;
console.println("value of Desired Effetive Date: " + this.getField("Desired Effective Date").value);
var oMyDate = util.scand("mm-dd-yyyy", this.getField("Desired Effective Date").value);
console.println("Date object Desired Effective Date: " + oMyDate);
oMyDate.setFullYear(oMyDate.getFullYear() + 1);
console.println("Desired EWffective Date + 1 year: " + oMyDate);

Can you clarify what fields are involved in this? You mentioned fields "Desired Start Date" and "Desired End Date", and the code you posted uses "Desired Effective Date", "myStartDate", and "to" field names. What is the name of the field that this script is attached to?