How to Fix: ts-node returns Typescript errors when tsc does not
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Table of Contents
Context
Project building without errors with tsc, same ts-config sent to ts-node but ts-node raised Typescript errors.
Github issues found
Solution
The project recently had new module type definitions for npm modules which did not provide any as .d.ts files.
tsc knows about them already if they are in the tsconfig.json include property.
ts-node does not load all these files listed in the tsconfig automatically. But it will load explicitly mentioned type files in the typeRoots or paths compiler option.
To fix it, I added the folder where the modules’ types were defined in the compiler option typeRoots:
{ // tsconfig.json // ...>8... "compilerOptions": { // ...>8... "typeRoots": [ "./node_modules/@types", "./src/@types" // <- The added types folder ] // ...>8... } // ...>8---}