How to pass Value from one topic to another in Virtual Agent

[pandeyved]

Hi All,
I have a requirement of passing a variable from one topic to another topic.
I am defining one variable like this to store the user input:

vaVars.selectedCategory = vaInputs.select_topic_related_to_your_problem;

 Let's say selectedCategory is Hardware.

So I want this variable in another topic:
In another topic I am parsing one system Property like this:

var sysPropertyValue = gs.getProperty('x_4dai_va.connected_content_id');

var sysPropertyObject = JSON.parse(sysPropertyValue);

var topicSysId = sysPropertyObject[selectedCategory];

var options = [];

gs.info("line15"+topicSysId);

But in logs I can see in the second topic where I am fetching the value, it showing selectedCategory is not defined. 
How I can make it work so that selectedCategory should store correct value that is Hardware, to give it's corresponding sysId.
Kindly Guide.
Thanks

[Mark Roethof]

LiveAgent_selectedCategory = vaInputs.select_topic_related_to_your_problem.getValue();

This will result in not defined. Because you didn't do so.

[pandeyved]

@Mark Roethof So can you please help, how I can write it.
It will be very helpful for me.
Thanks

[Mark Roethof]

Basically at the start of your script, your just suddenly mentioning out of the blue:

LiveAgent_selectedCategory

That's not possible in any ServiceNow scripting. You do need to define it. So also within Virtual Agent scripting. Like:

var LiveAgent_selectedCategory = 'blablalba';

vaVars.LiveAgent_selectedCategory = 'blablabla';

vaContext.LiveAgent_selectedCategory = 'blablabla';

Etc..

[pandeyved]

Thanks for your time and reply @Mark Roethof 

But you can see here in first topic, I am defining here as:

vaVars.LiveAgent_selectedCategory='';

LiveAgent_selectedCategory = vaInputs.select_topic_related_to_your_problem.getValue();
And in Second topic where I need this Variable's value, I am using it as 

var sysPropertyValue = gs.getProperty('x_4dai_va.connected_content_id');

var sysPropertyObject = JSON.parse(sysPropertyValue);

var topicSysId = sysPropertyObject[vaVars.LiveAgent_selectedCategory];

If am directly using it as LiveAgent_selectedCategory then it is returning as undefined, and if I am using it with vaVars then I am getting as null.
So how to define it in second topic so it should work.

thanks

[Mark Roethof]

"So how to define it in second topic so it should work."

Using vaContext.