typescript error with verbatimModuleSyntax: true in tsconfig.json

[nktnet1]

If we have the following in our tsconfig.json:

{
  "compilerOptions": {
    "skipLibCheck": true,

    // https://www.typescriptlang.org/tsconfig/#verbatimModuleSyntax
    "verbatimModuleSyntax": true
    
    
  },
  "exclude": ["node_modules"]
}

The following error occurs when running tsc:

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/index.ts:2:5 - error TS1484: 'ArrayCsvStringifierParams' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

2     ArrayCsvStringifierParams,
      ~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/index.ts:4:5 - error TS1484: 'ObjectCsvStringifierParams' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

4     ObjectCsvStringifierParams
      ~~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/index.ts:6:9 - error TS1484: 'ArrayCsvWriterParams' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

6 import {ArrayCsvWriterParams, CsvWriterFactory, ObjectCsvWriterParams} from './lib/csv-writer-factory';
          ~~~~~~~~~~~~~~~~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/index.ts:6:49 - error TS1484: 'ObjectCsvWriterParams' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

6 import {ArrayCsvWriterParams, CsvWriterFactory, ObjectCsvWriterParams} from './lib/csv-writer-factory';
                                                  ~~~~~~~~~~~~~~~~~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifier-factory.ts:4:9 - error TS1484: 'ObjectStringifierHeader' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

4 import {ObjectStringifierHeader} from './record';
          ~~~~~~~~~~~~~~~~~~~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifiers/abstract.ts:2:9 - error TS1484: 'Field' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

2 import {Field} from '../record';
          ~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifiers/array.ts:3:9 - error TS1484: 'Field' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

3 import {Field} from '../record';
          ~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifiers/object.ts:3:9 - error TS1484: 'Field' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

3 import {Field, ObjectHeaderItem, ObjectStringifierHeader} from '../record';
          ~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifiers/object.ts:3:16 - error TS1484: 'ObjectHeaderItem' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

3 import {Field, ObjectHeaderItem, ObjectStringifierHeader} from '../record';
                 ~~~~~~~~~~~~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifiers/object.ts:3:34 - error TS1484: 'ObjectStringifierHeader' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

3 import {Field, ObjectHeaderItem, ObjectStringifierHeader} from '../record';
                                   ~~~~~~~~~~~~~~~~~~~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifiers/object.ts:4:19 - error TS1484: 'ObjectMap' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

4 import {isObject, ObjectMap} from '../lang/object';
                    ~~~~~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-writer-factory.ts:3:9 - error TS1484: 'ObjectStringifierHeader' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

3 import {ObjectStringifierHeader} from './record';
          ~~~~~~~~~~~~~~~~~~~~~~~

node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/field-stringifier.ts:1:9 - error TS1484: 'Field' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.

1 import {Field} from './record';
          ~~~~~


Found 13 errors in 7 files.

Errors  Files
     4  node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/index.ts:2
     1  node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifier-factory.ts:4
     1  node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifiers/abstract.ts:2
     1  node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifiers/array.ts:3
     4  node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-stringifiers/object.ts:3
     1  node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/csv-writer-factory.ts:3
     1  node_modules/.pnpm/[email protected]/node_modules/csv-writer/src/lib/field-stringifier.ts:1
 ELIFECYCLE  Command failed with exit code 2.

[adam-nielsen]

I just had this same issue. The problem is that the NPM package includes the Typescript source files, not just the compiled Javascript and the *.d.ts files.

This means it's hitting this bug from 2020 and failing the build.

As a temporary workaround you can delete the node_modules/csv-writer/src/ folder, but the proper solution is that the src folder shouldn't be included as part of the NPM package.

[nktnet1]

Yeah, thanks @adam-nielsen. This should indeed be removed:

csv-writer/package.json

Line 35 in 4b36c0c

"src",

Doesn't look like csv-writer is being actively maintained anymore though, so I've switched to using csv-stringify.