JavaScript PDF JS to calculate time difference in hours and minutes

[RedBeard]

Got some AI to slap this together and it isn't working. I've tinkered with different languages but its not more than a vague familiarity.

// Define the custom calculation script for the Total field
var alertField = this.getField("Alert");
var inServiceField = this.getField("InService");
var totalField = this.getField("Total");


// Calculate the time difference between Alert and In Service fields
function calculateTimeDifference() {
    var alertTime = alertField.value;
    var inServiceTime = inServiceField.value;


    // Parse the time strings into Date objects
    var alertDate = util.scand("h:MM tt", alertTime);
    var inServiceDate = util.scand("h:MM tt", inServiceTime);


    // Calculate the time difference in milliseconds
    var timeDifference = inServiceDate.getTime() - alertDate.getTime();


    // Convert the time difference to hours and minutes
    var hours = Math.floor(timeDifference / (1000 * 60 * 60));
    var minutes = Math.floor((timeDifference % (1000 * 60 * 60)) / (1000 * 60));


    // Update the Total field with the calculated difference
    totalField.value = hours.toString() + " hours " + minutes.toString() + " minutes";
}


// Set the calculation script to trigger when either Alert or In Service changes
alertField.setAction("Calculate", calculateTimeDifference);
inServiceField.setAction("Calculate", calculateTimeDifference);

 

[Johna]

Got some AI to slap this together and it isn't working.

This is not unexpected when copying and pasting code generated by AI.

With the information you've provided, it's impossible for me to tell what the problem is.
Do you know why it's not working? Are there any errors in the console?
I assume this isn't the complete code. As far as I know, there's no getField() method on the global window object, which this refers to in the global scope. Are there any libraries you're using?