I published a new article today, discussing an exercise I had last week in troubleshooting errors in a web application. The document covers a few of the areas of my workshop from a few weeks back. All developers should have these techniques in their pocket.
The article is Using Application Insights and Performance Monitor to Troubleshoot Environment Errors.
Last week on the their podcast, Andrew and Chris also discussed Application Insights. AC mentioned he used the javascript/client side compenents quite extensively. I encourage you to give a listen to Episode 94 (Yo Office, Office UI Fabric and a Real World Azure Performance Retrospective) as well as AC's blog post Using Azure Application Insights with Single-Page Apps.