generated .d.ts is stripped of comments when removeComments: true

[TanxiangCode]

What happens and why it is wrong

1. There is no comment content in the d.ts declaration file generated by the vue file
2. Private members are also defined in the declaration file

Environment

Versions

    "rollup": "^2.38.0",
    "rollup-plugin-babel": "^4.4.0",
    "rollup-plugin-cleaner": "^1.0.0",
    "rollup-plugin-cleanup": "^3.2.1",
    "rollup-plugin-postcss": "^4.0.0",
    "rollup-plugin-terser": "^5.3.1",
    "rollup-plugin-typescript2": "^0.29.0",
    "rollup-plugin-vue": "^5.1.9",

rollup.config.js

`rollup.config.js`:

typescript({
      tsconfig: './tsconfig.json',
      abortOnError: false,
      tsconfigOverride: {
        declaration: true,
        declarationDir: './lib',
        emitDeclarationOnly: true,
        noImplicitAny: false,
        removeComments: true,
        exclude: ['node_modules', 'lib', 'dev'],
      })

tsconfig.json

`tsconfig.json`:

{
    "compilerOptions": {
        "target": "esnext",
        "module": "esnext",
        "strict": true,
        "jsx": "preserve",
        "importHelpers": true,
        "moduleResolution": "node",
        "experimentalDecorators": true,
        "skipLibCheck": true,
        "esModuleInterop": true,
        "allowSyntheticDefaultImports": true,
        "sourceMap": true,
        "baseUrl": ".",
        "composite": false,
        "declaration": true,
        "declarationDir": "./lib",
        "emitDeclarationOnly": false,
        "noImplicitAny": false,
        "removeComments": true,
        "types": [
            "node",
            "vue"
        ],
        "paths": {
            "@qinglan-ui/*": [
                "packages/*"
            ]
        },
        "lib": [
            "esnext",
            "dom",
            "dom.iterable",
            "scripthost"
        ]
    },
    "exclude": [
        "node_modules",
        "lib",
    ]
}

package.json

`package.json`:

plugin output with verbosity 3

plugin output with verbosity 3:

import { Vue } from 'vue-property-decorator';
import { ITableColumn } from './table';
export default class Table extends Vue {
    data: any;
    columnData: Array<ITableColumn>;
    private getIndex;
}

[ezolenko]

Is this different from what typescript would generate if you call it directly outside of rollup?

[agilgur5]

OP has removeComments: true in their tsconfig.json (and tsconfigOverride as well), which, per the docs (and its name), strips comments.

So I believe tsc would have similar output, as that's what it was configured to do.

Closing as that seems to be correct behavior (unless .d.ts is supposed to have comments while .js isn't? the docs aren't clear on that), and because OP never responded to requests for more information.

[ImLunaHey]

Related: microsoft/TypeScript#14619