Decorators support

[huseeiin]

Describe the feature

ERROR: Transforming JavaScript decorators to the configured target environment ("es2020") is not supported yet

tsconfig.json:

{
    "compilerOptions": {
        "lib": ["ESNext", "DOM"],
        "target": "ESNext",
        "module": "ESNext",
        "strict": true,
        "exactOptionalPropertyTypes": true,
        "noUncheckedIndexedAccess": true,
        "esModuleInterop": true,
        "moduleResolution": "node",
        "noEmit": true,
        "skipLibCheck": true,
        "experimentalDecorators": true,
        "strictPropertyInitialization": false,
        "emitDecoratorMetadata": true
    }
}

Additional information

• [ ] Would you be willing to help implement this feature?

[colmugx]

same..

[sadeghbarati]

Hi, I don't know it's related but have you guys add tslib to dependencies? what is your typescript version?

[colmugx]

but it works in 1.2.1

[OSpoon]

I also tried to build the module that used decoration and got the same error as above

[hengshanMWC]

The same mistake, do you want to use babel to transfer the insurance first

[zhangjiluo-com]

same mistake

[zsilbi]

Workaround:

Create a build.config.ts with the following:

import { defineBuildConfig } from 'unbuild';

export default defineBuildConfig({
  rollup: {
    esbuild: {
      tsconfigRaw: {
        compilerOptions: {
          experimentalDecorators: true,
        },
      },
    },
  },
});

or add the following section to the package.json:

"unbuild": {
  "rollup": {
    "esbuild": {
      "tsconfigRaw": {
        "compilerOptions": {
          "experimentalDecorators": true
        }
      }
    }
  }
}