VSCode can't find modules

[Felipe S. Borsato]

Visual Studio Code display many errors on imports indicating that modules couldn't be found. I'm pretty sure those modules are actually present, since I could build and run Chromium with no problems. Am I missing something? Thanks for your help.

I'm attaching a screenshot sampling such errors.

import {CrMenuSelector} from 'chrome://resources/cr_elements/cr_menu_selector/cr_menu_selector.js';

Cannot find module 'chrome://resources/cr_elements/cr_menu_selector/cr_menu_selector.js' or its corresponding type declarations.ts(2307)

[K. Moon]

These resources are served from a special chrome:// URL, and Visual Studio Code (and more specifically, the TypeScript compiler) has no way to figure out how to find them. Furthermore, some of these resources only exist after a Chromium build.

If you want to try and work around this, you could try passing some options to tsc:

https://www.typescriptlang.org/docs/handbook/module-resolution.html#additional-module-resolution-flags

I'm not aware of any existing configuration for this, though.

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[Luciano Pacheco]

You can try to generate the tsconfig.json for the area of the code that you're working on.

I work mostly on //ui/file_manager/ and I generate like this:
$ ash/webui/personalization_app/tools/gen_tsconfig.py --root_out_dir out/dbg-cros/  --gn_target ui/file_manager:test_build_ts

For your screenshot probably something like:

$  ash/webui/personalization_app/tools/gen_tsconfig.py --root_out_dir out/Default --gn_target chrome/browser/resources/settings:build_ts

After that we might need to git ignore that generate tsconfig.json.

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