javascript - running js libraries that use require in typescript + bunJS forces the use of .default - Stack Overflow

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I am trying to integrate an existing library in my new codebase using typescript and Bun. i am facing an issue where this library is requiring modules in code asynchronously, like follows :

let target = require(AppRoot + targetName);
        target.execute(targetTask);

so passing in the targetName, it can require the module which is a default exported object (usually an instantiated class). This was working fine when i was using this library in JS but when switching to Typescript the target became an Object with default being the actual instantiated class :

// in Javascript
Target {
  execute : [Function]
}
// in Typescript
Target {
  default : {
    execute : [Funtion]
  }
}

This change breaks the entire library of course as it relies on reading files that way. I am not suer if this is a Bun or Typescript issue, but is there a way to bypass forcing the default when importing for a specific library

Note: I already have esModuleInterop set to true in my tsconfig which according to chatgpt is the only hand-off solution

I am trying to integrate an existing library in my new codebase using typescript and Bun. i am facing an issue where this library is requiring modules in code asynchronously, like follows :

let target = require(AppRoot + targetName);
        target.execute(targetTask);

so passing in the targetName, it can require the module which is a default exported object (usually an instantiated class). This was working fine when i was using this library in JS but when switching to Typescript the target became an Object with default being the actual instantiated class :

// in Javascript
Target {
  execute : [Function]
}
// in Typescript
Target {
  default : {
    execute : [Funtion]
  }
}

This change breaks the entire library of course as it relies on reading files that way. I am not suer if this is a Bun or Typescript issue, but is there a way to bypass forcing the default when importing for a specific library

Note: I already have esModuleInterop set to true in my tsconfig which according to chatgpt is the only hand-off solution

• javascript
• typescript
• bun

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1 Answer 1

Sorted by: Reset to default 0

If you are using Bun just do

bun build --target=node file.js --outfile.js

Or, if you want, --target=bun.

Or, just execute the TypeScript .ts file directly with bun file.ts.

Done.

No tsconfig.json necessary because Bun doesn't parse Microsoft TypeScript with tsc.

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