context.log vs console.log in Azure function apps

You can redirect console.log to context.log with my npm package so you dont have to pass down the context everywhere.

https://www.npmjs.com/package/azure-function-log-intercept

Source here if you just want to create your own module

https://github.com/BrianRosamilia/azure-function-log-intercept/blob/master/index.js

This documentation should answer your question :)

In Functions, you use the context.log methods to write trace output to the console. In Functions v2.x, trace outputs using console.log are captured at the Function App level. This means that outputs from console.log are not tied to a specific function invocation, and hence aren't displayed in a specific function's logs. They do, however, propagate to Application Insights. In Functions v1.x, you cannot use console.log to write to the console.

Long story short - context.log is best!