How to pass parameter between widgets on same page, or on different page

[Otis]

I am new to ServiceNow -Service Portal.  I am working on our Service Portal project.  I am having some challenges for a communication between widgets. 

I like to learn any hands-on sample on how to pass unique parameter value between widgets at different levels (within page or from a page to a page) .

[John Zhang1 · Accepted solution]

Your scope is how to pass unique parameter value between widgets within same page, or from a page to another pages.  The following posts have covered your requirement.

How to communicate between widgets in Service Portal

How to pass data from one Widget to another Widget on Same Page || ServiceNow Portal

 How to pass data from one Widget to another Widget in Different Page || ServiceNow Portal