tsserver

.gitignore

node_modules

index.ts

import { CommandTypes, QuickInfoRequest, FileRequestArgs, OpenRequest } from "typescript/lib/protocol";
import { resolve } from "path";
import { spawn } from "child_process";
import { createInterface } from "readline";

const fileArgs: FileRequestArgs = {
  file: resolve(__dirname, `./test.ts`),
  projectFileName: resolve(__dirname, `../tsconfig.json`),
};

const openReq: OpenRequest = {
  command: CommandTypes.Open,
  type: "request",
  seq: 1,
  arguments: fileArgs,
};

const infoReq: QuickInfoRequest = {
  command: CommandTypes.Quickinfo,
  type: "request",
  seq: 2,
  arguments: {
    ...fileArgs,
    line: 25,
    offset: 15,
  },
};

async function run() {
  const tsserver = spawn(require.resolve("typescript/bin/tsserver"), ["--suppressDiagnosticEvents"], {
    stdio: "pipe",
  });

  if (!tsserver.stdout || !tsserver.stdin) {
    throw "x";
  }

  const rl = createInterface({
    input: tsserver.stdout,
  });

  rl.on("line", (line) => {
    if (/^(Content-Length:.*|)$/.test(line)) {
      return;
    }
    const parsed = JSON.parse(line);

    if (parsed.type !== "response" || parsed.command !== CommandTypes.Quickinfo) {
      return;
    }

    console.log(parsed);
  });

  tsserver.stdin.write(JSON.stringify(openReq) + "\r\n");
  tsserver.stdin.write(JSON.stringify(infoReq) + "\r\n");
}

run();

output.log

yarn run v1.22.10
$ ts-node index.ts
{
  seq: 0,
  type: 'response',
  command: 'quickinfo',
  request_seq: 2,
  success: true,
  body: {
    kind: 'const',
    kindModifiers: '',
    start: { line: 25, offset: 11 },
    end: { line: 25, offset: 20 },
    displayString: 'const evaluated: {\n' +
      '    data?: undefined;\n' +
      '    error?: undefined;\n' +
      '    fulfilledTimeStamp?: undefined;\n' +
      '    originalArgs?: undefined;\n' +
      '    requestId?: undefined;\n' +
      '    endpointName?: string | undefined;\n' +
      '    startedTimeStamp?: undefined;\n' +
      '    status: QueryStatus.uninitialized;\n' +
      '    isLoading: false;\n' +
      '    isFetching: false;\n' +
      '    isSuccess: false;\n' +
      '    isError: false;\n' +
      '    isUninitialized: true;\n' +
      '    refetch: () => void;\n' +
      '} | {\n' +
      '    error?: FetchBaseQueryError | SerializedError | undefined;\n' +
      '    fulfilledTimeStamp?: number | undefined;\n' +
      '    originalArgs?: void | undefined;\n' +
      '    requestId?: string | undefined;\n' +
      '    endpointName?: string | undefined;\n' +
      '    startedTimeStamp?: number | undefined;\n' +
      '    status: QueryStatus;\n' +
      '    isUninitialized: false;\n' +
      '    isSuccess: false;\n' +
      '    isError: false;\n' +
      '    isLoading: true;\n' +
      '    isFetching: boolean;\n' +
      '    data: undefined;\n' +
      '    refetch: () => void;\n' +
      '} | {\n' +
      '    originalArgs?: void | undefined;\n' +
      '    requestId?: string | undefined;\n' +
      '    endpointName?: string | undefined;\n' +
      '    startedTimeStamp?: number | undefined;\n' +
      '    status: QueryStatus;\n' +
      '    isUninitialized: false;\n' +
      '    isLoading: false;\n' +
      '    isError: false;\n' +
      '    isSuccess: true;\n' +
      '    isFetching: boolean;\n' +
      '    error: undefined;\n' +
      '    data: "Result";\n' +
      '    fulfilledTimeStamp: number;\n' +
      '    refetch: () => void;\n' +
      '} | {\n' +
      '    data?: "Result" | undefined;\n' +
      '    fulfilledTimeStamp?: number | undefined;\n' +
      '    originalArgs?: void | undefined;\n' +
      '    requestId?: string | undefined;\n' +
      '    endpointName?: string | undefined;\n' +
      '    startedTimeStamp?: number | undefined;\n' +
      '    status: QueryStatus;\n' +
      '    isUninitialized: false;\n' +
      '    isLoading: false;\n' +
      '    isFetching: false;\n' +
      '    isSuccess: false ...',
    documentation: '',
    tags: []
  }
}

package.json

{
  "name": "quickinfo",
  "version": "1.0.0",
  "main": "index.js",
  "author": "Lenz Weber",
  "license": "MIT",
  "dependencies": {
    "ts-toolbelt": "^9.6.0",
    "typescript": "^4.2.4"
  },
  "devDependencies": {
    "@reduxjs/toolkit": "^1.6.0-alpha.1",
    "@types/node": "^14.14.41",
    "ts-node": "^9.1.1"
  },
  "scripts": {
    "start": "ts-node index.ts"
  }
}

test.ts

import { createApi, fetchBaseQuery } from "@reduxjs/toolkit/query/react";
import { A } from "ts-toolbelt";

type Id<T> = { [K in keyof T]: T[K] } & {};

declare function withParams<T extends (...args: any[]) => unknown>(fn: T, cb?: (params: Parameters<T>) => void): void;
declare function getParams<T extends (...args: any[]) => unknown>(fn: T): Parameters<T>;
declare function compute<T>(t: T): A.Compute<T, "deep">;
declare function id<T>(t: T): Id<T>;
declare function quickinfo(target: any): void;

const api = createApi({
  reducerPath: "apiOne",
  baseQuery: fetchBaseQuery({ baseUrl: "/" }),
  endpoints: (builder) => ({
    test: builder.query<"Result", void>({
      query: () => "",
    }),
  }),
});

const result = api.useTestQuery();
const evaluated = id(result);

quickinfo(evaluated);

if (evaluated.isUninitialized) {
  quickinfo(evaluated);
}

if (evaluated.isFetching) {
  quickinfo(evaluated);
}

if (evaluated.isSuccess) {
  quickinfo(evaluated);
}

tsconfig.json

{
  "compilerOptions": {
    "target": "es5",                                /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
    "module": "commonjs",                           /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
    "strict": true,                                 /* Enable all strict type-checking options. */
    "esModuleInterop": true,                        /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    "skipLibCheck": true,                           /* Skip type checking of declaration files. */
    "forceConsistentCasingInFileNames": true,        /* Disallow inconsistently-cased references to the same file. */
    "noErrorTruncation": true
  }
}

yarn.lock

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