TypeError: assert is not a function

[miohtama]

I have been using assert-ts fine with different environments. However, now when running with Node v16.14.2 in SvelteKit with its Node.Js adapter for Trading Strategy frontend I am getting the following error:

import assert from 'assert-ts';

console.log("Assert is", assert);
assert(input, 'input number missing');

TypeError: assert is not a function

The assert object looks good based on console.log output:

Assert is {
  configureAssert: [Getter],
  testResetConfiguration: [Getter],
  assert: [Getter],
  default: [Function: hardAssert] { soft: [Function: softAssert] }
}

This happens only when running SvelteKit application using Node.js production build adapter, not when running it with Vite development server.

Will keep debugging. All tips welcome.

[miohtama]

This has something to do with the default export. If you use the following syntax:

import { assert } from 'assert-ts';

The assert() works fine. In this case you get:

< Assert is [Function: hardAssert] { soft: [Function: softAssert] }

I suspect some kind of issue with TypeScript build pipeline or SvelteKit JavaScript transpiling.

[bjornegil]

@miohtama, thanks for reporting and debugging! I think it's useful to still support the default export/import, depending on your preferences (and environment). Do you have any proposals for changing the code, or should I close the issue?

[miohtama]

I thin you can close it, but I feel this also should be reflected in the documentation somehow. I do not have a concrete proposal how, though, because I do not understand the context when default imports do not work.