Let's say your application supports a plugin marketplace where community can build plugins for your app. For eg, a testrail plugin for JIRA or a diagramming pl

Let's say your application supports a plugin marketplace where community can build plugins for your app. For eg, a testrail plugin for JIRA or a diagramming plugin on Google Docs. You would want to run these plugins in their own DOM so that they don't accidentally slow down the main app.