Debugging and VSCode Webviews

[ngfelixl]

Hi everyone,

I am working with VSCode Webviews in Theia and when I run the browser build (probably only with the debugger, not just "npm run...") in VSCode, opening webviews become incredibly slow and it throws

Uncaught DOMException InvalidAccessError: Failed to execute 'put' on 'Cache': Entry already exists.
at (program) (...@theia\plugin-ext\src\main\browser\webview\webview-resource-cache.ts:86:5)

Do you have any ideas why this could happen? Is there a cache on the filesystem which I have to remove once in a while?

Another point is, that I am not able to set breakpoints properly for webviews. They are a react app and compiled with inline sourcemaps. Opening those webviews in VSCode allows setting breakpoints, however I have not been able to achieve this with Theia.