onchange client script, oldValue is not coming in the alert.

[Community Alums]

Hi All,

Its a Yes/No catalog variable. I have written a onchange client script. The requirement is something like "if the particular field changes from Yes to No, do the logic". 

So i wrote like below, if (oldValue is Yes & newValue is No) but its not working. Even the alert in the 5th line is empty for oldValue, newValue alert is coming.

[Mark Roethof]

That the validation is not working, is as expected and correct. newValue does not work this way. That's why I was asking for more details on your case. What you are describing will not work with using oldValue. oldValue is the original value, this is not the value from before an onchange, its the original value from the form load.

Kind regards,
Mark
2020, 2021 ServiceNow Community MVP
2020, 2021 ServiceNow Developer MVP

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[Community Alums]

Thanks Mark, then do you have any idea how can i implement this? show alert only when value changes from Yes to No.

[Ankur Bawiskar]

Hi,

Where is this not working?

Did you set UI Type - ALL for your client script

Does your variable has Include None as well?

Regards
Ankur

[Community Alums]

In the serviceportal Ankur.

Yes UI type is All and my variable include none as well.

OldValue is getting empty, newValue is coming in the alert properly.

Screenshot 1 : 

Screenshot 2 : 

From the pics you can see that Old is getting empty.

[Mark Roethof]

Any input to my questions?

Like I asked, please describe your case more. I suspect this is about entering a new Catalog Item. As I mentioned, then using your approach is not correct. If my answer helped you in any way, please then mark it as helpful.

Kind regards,
Mark
2020, 2021 ServiceNow Community MVP
2020, 2021 ServiceNow Developer MVP

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