Doug Doug - 4 years ago 355
Node.js Question

Azure Functions: How to debug in WebStorm?

The azure-functions-cli offers a way to kickoff debugging, but these instructions seem to be Visual Studio specific.

I tried using a similar trick to serverless by setting up a run config in WebStorm to point the JavaScript file to:


And then passing the Application args:

run myFunctionName --debug

This successfully runs the functions with Azure's tools, but both WebStorm tries to set a debugging port; and when the Azure window opens up it sets its own debugging port.

From Webstorm:

C:\Program Files (x86)\JetBrains\WebStorm 2016.2.3\bin\runnerw.exe" "C:\Program Files\nodejs\node.exe" --debug-brk=60168 --expose_debug_as=v8debug C:\Users\username\AppData\Roaming\npm\node_modules\azure-functions-cli\lib\main.js run myfunction --debug
Debugger listening on [::]:60168
System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException:

Likewise, Azure-cli says it opens a debugging port, but they do not match.

As a result, breakpoints set are ignored when the functions are called (Though it does successfully run).

Anybody know how to configure this properly to be able to use WebStorm to debug?

Answer Source

Okay, it looks like you can not do this with local debugging, but can with "Remote Debugging" within WebStorm.

  1. Within WebStorm from Run -> Edit Configurations create a new "Node.JS Remote Debug".
  2. Give the debugging some type of name.
  3. Hit the + Sign where it says, "Before Launch: External Tool" and choose "Run External Tool".
  4. Hit the + Sign again and fill it out like the screen-shot (This is assuming you installed the Azure Function CLI globally). Edit Tool Window
  5. Within WebStorm choose Run-> Debug:"What_You_Named_the_Remote_Profile"

  6. Add some breakpoints.

  7. Navigate to your API end-point and see that the break-points work.

NOTE: By default it appears the function will be at http://localhost:7071/api/functionName

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