parcel: @parcel/transformer-typescript-types: Debug Failure. Unhandled SyntaxKind: ImportClause.

🎛 Configuration

`package.json`

{
    "source": "source/index.ts",
    "types": "dist/index.d.ts",
    "module": "dist/index.esm.js",
    "main": "dist/index.js",
    "dependencies": {
        "@swc/helpers": "^0.4.11",
        "class-validator": "^0.13.2",
        "koajax": "^0.8.1",
        "reflect-metadata": "^0.1.13",
        "regenerator-runtime": "^0.13.9",
        "web-utility": "^3.9.2"
    },
    "peerDependencies": {
        "mobx": ">=4 <6"
    },
    "devDependencies": {
        "@parcel/packager-ts": "^2.7.0",
        "@parcel/transformer-typescript-types": "^2.7.0",
        "@types/node": "^14.18.26",
        "dotenv": "^16.0.1",
        "mobx": "^5.15.7",
        "parcel": "^2.7.0",
        "typescript": "~4.8.2"
    },
    "browserslist": "> 0.5%, last 2 versions, not dead, IE 11",
    "targets": {
        "main": {
            "optimize": true
        }
    },
    "scripts": {
        "build": "rm -rf dist/ docs/  &&  parcel build"
    }
}

`tsconfig.json`

{
    "compilerOptions": {
        "target": "ES5",
        "module": "ES6",
        "moduleResolution": "Node",
        "esModuleInterop": true,
        "downlevelIteration": true,
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "skipLibCheck": true,
        "lib": ["ES2022", "DOM", "DOM.Iterable"]
    },
    "include": ["source/*"]
}

🤔 Expected Behavior

Build TS libraries with typescript@^4.8.0 successfully.

😯 Current Behavior

Throw an error with typescript@4.8.2:

@parcel/transformer-typescript-types: Debug Failure. Unhandled SyntaxKind: ImportClause.

but succeed with typescript@^4.7.0.

💁 Possible Solution

Support ImportClause Syntax Kind.

💻 Code Sample

idea2app/MobX-RESTful#6

🌍 Your Environment

Software	Version(s)
Parcel	2.7.0
Node	14.19.1
PNPM	7.9.5
Operating System	Windows 10 Pro 21H2

About this issue

Original URL
State: closed
Created 2 years ago
Reactions: 9
Comments: 18 (2 by maintainers)

Commits related to this issue

Downgrade TS to fix build https://github.com/parcel-bundler/parcel/issues/8419 — committed to kachkaev/routine-npm-packages by kachkaev 2 years ago

Most upvoted comments

Using the package-lock.json or yarn.lock to pin a dependency version is abusive and dangerous. An acceptable workaround is to use yarns “resolutions” field. For example in your (root when using workspaces) package.json file:

"resolutions": {
   "typescript": "~4.7"
}

levino on Sep 5, 2022

@levino I think there’re Interface Breaking Changes between TS 4.7 and 4.8, which needs Parcel to adapt.

TechQuery on Aug 29, 2022

Lets continue this conversation in your repo.

levino on Nov 17, 2022

If I recall I have tried resolutions but ts 4.8 still got in through from another project in the monorepo.

When yarn list showed TS 4.8 in the root project and 4.7 in the leaf project, Parcel still got 4.8. Gotta fight the module resolution a bit.

wkrueger on Nov 17, 2022

Hi @devongovett , could you plz. suggest the solution to this issue. I am using pnpm workspace and TS 4.8.4, also tried the above suggestion and downgraded the TS to 4.7 still got the same issue.

shubham-kaushal on Nov 11, 2022