Script variable declaration

[Ian Heath]

What is the recommendation in relation to declaration of variables in scripts?

I have a test/demo field script which is executed every time a check mark is changed.

The problem I have is when this is run for the 2nd and subsequent times I get an error since the variable is already declared (see error on screenshot attached).

var upc_lookup_id = 'fld-8b5f99cd185044f8a0b35204db4c86ac';
record.getFieldValue(upc_lookup_id);
var callbackFunction = function() {
	console.log(value_1);
};
var value_1;
let prompter = Prompter.new();
prompter.addParameter('Label 1')
.show('Message prompt', callbackFunction);
record.setFieldValue(upc_lookup_id, false);
document.saveAllChanges();

It’s entirely possible I’m doing something daft since I’m new to javascript!

Attachments:

You must be logged in to view attached files.

[Brendan]

It’s best to declare variables within a function declaration.

function runPrompter() {
   var upc_lookup_id = 'fld-8b5f99cd185044f8a0b35204db4c86ac';
   record.getFieldValue(upc_lookup_id);

   var callbackFunction = function() {
	console.log(value_1);
   };

   var value_1;
   let prompter = Prompter.new();
   prompter.addParameter('Label 1').show('Message prompt', callbackFunction);
   record.setFieldValue(upc_lookup_id, false);
   document.saveAllChanges();
}

runPrompter();

That should work.

But it may be that you’ve found a bug that’s not clearing out the JSContext when you run the script the second time.

Also probably that I haven’t tested the prompter within a Script Field. I’ve only ever used it within a Form Script.

[Author]

Posts