Encountering a Problem on Heroku: TypeScript Compilation Error with GraphQL Files - TS2307 Error: Module 'graphql' Not Found or Its Type Declarations Missing

While trying to compile my typescript project with graphql files for deployment on Heroku, I encountered the following error message:

node_modules/@types/graphql-upload/index.d.ts(10,35): error TS2307: Cannot find module 'graphql' or its corresponding type declarations.

My tsconfig.json configuration is as follows:

{
    "compilerOptions": {
      "outDir": "src",
      "rootDir": "src",
      "lib": ["ESNext"],
      "target": "ES6",
      "esModuleInterop": true,
      "strict": true,
      "types": ["@types/graphql-upload"]
    },
    "include": ["src/**/*"],
    "exclude": [""]
}

Here is a snippet from my package.json:

{
  "engines": {
    "node": "10.16.0",
    "npm": "6.5.0"
  },
  "scripts": {
    "start": "node src/index",
    "clean": "rm -rf src",
    "build": "tsc",
  },
  "dependencies": {
    "@types/graphql-upload": "^8.0.3",
    "@types/node-fetch": "^2.5.7",
    "graphql": "^14.7.0",
    "graphql-cli": "^3.0.5",
    "graphql-import": "^0.7.1",
  },
  "devDependencies": {
    "@types/node": "^14.0.19",
    "ts-node": "^8.10.2",
    "ts-node-dev": "^1.0.0-pre.50",
    "typescript": "^3.9.6"
  }

The structure of my file directory is as follows:

src -
    generated -
              prisma.graphql
    resolvers -
              Mutation.ts
              Query.ts
index.ts
schema.graphql

I am seeking assistance in identifying what I might be missing and how I can resolve this issue.

typescriptherokutypescript-typings

Answer №1

This is just a temporary solution, not a permanent fix

Although I haven't identified the root cause yet, I am currently addressing the issue by including this snippet in the compilerOptions:

  "compilerOptions": {
    "skipLibCheck": true
  }

You shouldn't need to make any other changes to the compiler options. I came across this workaround from a helpful comment on GitHub

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