What does "Define is not defined" and "synchronous require cannot resolve module 'vs/editor/editor.api'" mean in relation to using Monaco editor in a content script?

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"Define is not defined" usually indicates that the AMD loader (such as RequireJS) is not properly loaded or configured. It means that the code is trying to use the "define" function, but that function is not available.

"synchronous require cannot resolve module 'vs/editor/editor.api'" means that the code is trying to load a module (in this case, 'vs/editor/editor.api') synchronously with the "require" function, but the module cannot be found or loaded.

These errors suggest that there may be issues with how the Monaco editor is being loaded or used in the content script. It is usually necessary to properly configure the AMD loader and ensure that all required modules are properly included and loaded.