Sourcemaps are triggering the download of the mapped files when developer tools are open

By design Issue #11014505

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Details

Author
Ricardo B.
Created
Feb 21, 2017
Privacy
This issue is public.
Found in
  • Microsoft Edge
Reports
Reported by 1 person

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Steps to reproduce

On Edge, when the developer tools are open, all the source files are downloaded.

Repro:

1 - Open Edge
2 - Open Developer Tools
3 - Go to https://mdn.github.io/devtools-examples/sourcemaps-in-console/index.html

You should see 3 downloads instead of 2 (the .coffe script is also being downloaded). You can also confirm this with fiddler.

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    Comments and activity

    • Microsoft Edge Team

      Mike J. Feb 21, 2017 2017-02-21T18:49:27.227Z

      Changed Assigned To to “Jacob R.”

      Mike J. Feb 21, 2017 2017-02-21T18:49:27.227Z

      Changed Status to “Confirmed”

      OSG V. May 16, 2017 2017-05-16T19:14:32.073Z

      Changed Assigned To to “Leo L.”

      Sarah D. May 18, 2017 2017-05-18T20:56:31.64Z

      Changed Assigned To from “Leo L.” to “Anubha M.”

      Leo L. Jul 13, 2017 2017-07-13T21:00:43.3Z

      Changed Assigned To from “Anubha M.” to “Leo L.”

      Alex C. Aug 11, 2017 2017-08-11T21:29:38.463Z

      Changed Assigned To from “Leo L.” to “Anubha M.”

      Zoher G. Oct 2, 2017 2017-10-02T18:40:51.39Z

      Changed Status from “Confirmed” to “By design”

    • James M. Oct 29, 2017 2017-10-29T21:16:17.83Z Microsoft Edge Team

      Hello,

      Thank you for providing this information about the issue. F12 by default has the ‘Load sources mapped to this generated file’ icon toggled. If it is toggled, then the user will see main.coffee in the js folder and when they open the main.coffee file, actually see that the toggle is highlighted. Disabling the toggle and refreshing the page correctly produces main.js in the js folder; main.coffee no longer appears.
      The state of this icon is persistent in F12. If the user didn’t want the source maps to download, they would just turn off this toggle. Currently, we do not plan to release a fix for this problem. Please reopen this case if you can provide new information for us to consider.

      Best Wishes,
      The MS Edge Team

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