Check to see that you haven’t already excluded the module by adding it to your exclude array.
If the error message changes to "Could not find declaration file for module'module-name,' ” TypeScript has found the module you are attempting to import but cannot locate its type declarations.
How to Fix Cannot find module ‘X’ Error in TypeScript.
When TypeScript cannot find a third-party or local module in our project, the "Cannot find module or its matching type declarations" error occurs.
To resolve the error, ensure that the module is installed and that moduleResolution is set to node in your tsconfig.json file.
When TypeScript cannot find a third-party or local module in our project, the "Cannot find module or its matching type declarations" error occurs.
To resolve the error, ensure that the module is installed and that moduleResolution is set to node in your tsconfig.json file.
Check that you have the module installed if it is a third-party module.
Under the hood Karma uses ts-node to transpile TypeScript to JavaScript.
If the resolved tsconfig.json has module configured as ES formats.
You might get errors like SyntaxError:
