Cannot find module 'typescript'

[mkbctrl]

Do I have for that plugin to work properly to install TS locally in project DIR?
Here is the error I am getting while having TS globally:

 ERROR #11321  PLUGIN

"gatsby-plugin-ts" threw an error while running the onCreateWebpackConfig lifecycle:

Cannot find module 'typescript'
Require stack:
- /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/fork-ts-checker-webpack-plugin/lib/index.js
- /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby-plugin-ts/gatsby-node.js
- /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/resolve-module-exports.js
- /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/load-plugins/validate.js
- /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/load-plugins/load.js
- /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/load-plugins/index.js
- /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/index.js
- /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/commands/develop.js
- /Users/mkbctrl/.config/yarn/global/node_modules/gatsby-cli/lib/create-cli.js
- /Users/mkbctrl/.config/yarn/global/node_modules/gatsby-cli/lib/index.js

  61 |     var plugins = [];
  62 |     if (typeCheck) {
> 63 |         plugins.push(new fork_ts_checker_webpack_plugin_1.default(forkTsCheckerPlugin));
     |                      ^
  64 |     }
  65 |     var config = {
  66 |         module: {

File: node_modules/gatsby-plugin-ts/gatsby-node.js:63:22



  Error: Cannot find module 'typescript'
  Require stack:
  - /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/fork-ts-checker-webpack-plugin/lib/index.js
  - /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby-plugin-ts/gatsby-node.js
  - /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/resolve-module-exports.js
  - /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/load-plugins/validate.js
  - /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/load-plugins/load.js
  - /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/load-plugins/index.js
  - /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/bootstrap/index.js
  - /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/gatsby/dist/commands/develop.js
  - /Users/mkbctrl/.config/yarn/global/node_modules/gatsby-cli/lib/create-cli.js
  - /Users/mkbctrl/.config/yarn/global/node_modules/gatsby-cli/lib/index.js

when I install the TS locally, then I have shitstorm while trying to gatsby develop....

ERROR in /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/typescript/lib/lib.dom.d.ts(5720,13):
5720:13 Duplicate identifier 'FormData'.
    5718 | }
    5719 | 
  > 5720 | declare var FormData: {
         |             ^
    5721 |     prototype: FormData;
    5722 |     new(form?: HTMLFormElement): FormData;
    5723 | };


 ERROR #98123  WEBPACK

Generating SSR bundle failed

ERROR in /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/typescript/lib/lib.dom.d.ts(16123,11):
16123:11 Duplicate identifier 'URLSearchParams'.
    16121 | declare var webkitURL: typeof URL;
    16122 | 
  > 16123 | interface URLSearchParams {
          |           ^
    16124 |     /**
    16125 |      * Appends a specified key/value pair as a new search parameter.
    16126 |      */


 ERROR #98123  WEBPACK

Generating SSR bundle failed

ERROR in /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/typescript/lib/lib.dom.d.ts(16156,13):
16156:13 Duplicate identifier 'URLSearchParams'.
    16154 | }
    16155 | 
  > 16156 | declare var URLSearchParams: {
          |             ^
    16157 |     prototype: URLSearchParams;
    16158 |     new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
    16159 |     toString(): string;


 ERROR #98123  WEBPACK

Generating SSR bundle failed

ERROR in /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/typescript/lib/lib.dom.d.ts(20034,6):
20034:6 Duplicate identifier 'RequestInfo'.
    20032 | type HeadersInit = Headers | string[][] | Record<string, string>;
    20033 | type BodyInit = Blob | BufferSource | FormData | URLSearchParams | ReadableStream<Uint8Array> | string;
  > 20034 | type RequestInfo = Request | string;
          |      ^
    20035 | type BlobPart = BufferSource | Blob | string;
    20036 | type DOMHighResTimeStamp = number;
    20037 | type RenderingContext = CanvasRenderingContext2D | ImageBitmapRenderingContext | WebGLRenderingContext | WebGL2RenderingContext;


 ERROR #98123  WEBPACK

Generating SSR bundle failed

ERROR in /Users/mkbctrl/Documents/Developer/SI/gatsby-bootcamp/node_modules/typescript/lib/lib.dom.d.ts(20227,6):
20227:6 Duplicate identifier 'XMLHttpRequestResponseType'.
    20225 | type WebGLPowerPreference = "default" | "high-performance" | "low-power";
    20226 | type WorkerType = "classic" | "module";
  > 20227 | type XMLHttpRequestResponseType = "" | "arraybuffer" | "blob" | "document" | "json" | "text";
          |      ^
    20228 | 

and so on....

Anyone had similar issues?

[d4rekanguok]

Hi @mkbctrl, thanks for trying out this library & sorry that it didnt go smoothly for you.

It looks like typescript has to be installed locally, I'll check if there's a way around that. Regarding the errors you met, it's likely to be something in your tsconfig. What does your tsconfig.json look like?

[mkbctrl]

Found a workaround for the typescript here: https://www.typescriptlang.org/docs/handbook/react-&-webpack.html

you can use npm link typescript to connect with global TS.

Here is my tsconfig:

{
  "compilerOptions": {
    /* Basic Options */
    // "incremental": true,                   /* Enable incremental compilation */
    "target": "es5" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,
    "module": "ESNext" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
    "lib": [
      "dom"
    ] /* Specify library files to be included in the compilation. */,
    "allowJs": true /* Allow javascript files to be compiled. */,
    // "checkJs": true,                       /* Report errors in .js files. */
    "jsx": "preserve" /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */,
    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
    // "sourceMap": true,                     /* Generates corresponding '.map' file. */
    // "outFile": "./",                       /* Concatenate and emit output to single file. */
    "outDir": "./build" /* Redirect output structure to the directory. */,
    // "rootDir": "./",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    // "composite": true,                     /* Enable project compilation */
    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
    // "removeComments": true,                /* Do not emit comments to output. */
    // "noEmit": true,                        /* Do not emit outputs. */
    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */

    /* Strict Type-Checking Options */
    "strict": true /* Enable all strict type-checking options. */,
    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
    // "strictNullChecks": true,              /* Enable strict null checks. */
    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */

    /* Additional Checks */
    // "noUnusedLocals": true,                /* Report errors on unused locals. */
    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */

    /* Module Resolution Options */
    "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
    "baseUrl": "./" /* Base directory to resolve non-absolute module names. */,
    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
    // "typeRoots": [],                       /* List of folders to include type definitions from. */
    // "types": [],                           /* Type declaration files to be included in compilation. */
    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
    // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */

    /* Source Map Options */
    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */

    /* Experimental Options */
    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */

    /* Advanced Options */
    "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */,
    "paths": {
      "@*": ["src/*", "src/*/index"] /* Aliased imports like "@components" will be prompted as error without it */
    }
  }
}

[d4rekanguok]

my apologies for the late response here. Could you try adding include: ['src'] to your tsconfig to see if that helps?