Bug Report

Every time when I try to extend the abtract class Command and I try to compile I get the error: Error: Cannot find module src/classes/commandBase

🔎 Search Terms

• Module not found
• class module not found

🕗 Version & Regression Information

• v4.8.4

💻 Code

My project has the following structure:

   ├────tsconfig.json
   └────src
        ├───classes
        │   └───commandBase.ts
        ├───commands
        │   └───ping.ts
        ├...

tsconfig.json

{
  "compilerOptions": {
    "target": "ESNext",
    "module": "CommonJS",
    "rootDir": "./src/",
    "outDir": "./dist/",
    "strict": true,
    "moduleResolution": "node",
    "importHelpers": true,
    "experimentalDecorators": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "allowSyntheticDefaultImports": true,
    "resolveJsonModule": true,
    "forceConsistentCasingInFileNames": true,
    "removeComments": true,
    "typeRoots": ["node_modules/@types"],
    "sourceMap": true,
    "baseUrl": "./"
  },
  "include": ["./**/**/*.ts"],
  "exclude": ["node_modules", "dist"]
}

commandBase.ts

abstract class Command {
  name: string;
  abstract execute(client: Client, message: Message, args: string[]): void;

  constructor(name: string) {
    this.name = name;
  }
}
export default Command;

ping.ts

import Command from "src/classes/commandBase";

class Ping extends Command {
  constructor() {
    super("ping");
  }
  async execute(
    client: Client<boolean>,
    message: Message<boolean>,
    args: string[]
  ): Promise<void> {
    const m = await message.channel.send("Ping");
    m.edit(
      `Pong! Latency is ${
        m.createdTimestamp - message.createdTimestamp
      }ms. Discord Chat API Latency is ${Math.round(client.ws.ping)}ms`
    );
  }
}

export default Ping;

🙁 Actual behavior

Error: Cannot find module 'src/classes/commandBase'.

However if you change import Command from "src/classes/commandBase"; to import Command from "../classes/commandBase"; everything is working fine when importing.

BUT the weird behavior starts now: If you create a new file which import Command from 'src/classes/commandBase and exports a variable everything is working as intended. The error only appears when you extend a class.

file foo.ts

// This is working 
import Command from "src/classes/commandBase";

const foo: Command = {
  name: "",
  execute: function (
    client: Client,
    message: Message,
    args: string[]
  ): void {
    throw new Error("Function not implemented.");
  },
};
export default foo;

🙂 Expected behavior

Since the module exists it should be able to import.