Azure Monitor Application Insights is a cloud native application monitoring offering which enables customers to observe failures, bottlenecks, and usage patterns to improve application performance and effectiveness. The Browser SDK Loader (formerly called web snippet auto-injection) makes it easier to onboard to Application Insights usage experiences, allowing you to understand user behavior and pinpoint performance issues in the browser. Customers monitoring Node.js applications can take advantage of this new capability by upgrading to Application Insights Node.js SDK version 3.1 or later and setting the configuration ‘enableWebInstrumentation’ to ‘true’.
See Learn Documentation for details.