Typescript definition issue

I’m getting a TS error about: Cannot invoke an expression whose type lacks a call signature.

From what I found out, using the following typedef locally works fine:

declare module 'clipboard-copy' {
  function clipboardCopy (text: string): Promise<void>
  export default clipboardCopy
}

I’m on Typescript 3.2.

[LinusU]

@gfx that wouldn’t make a difference since in that case, we would do export = function clipboardCopy (text) { ... } to maintain compatibility with the current ecosystem.

Until ES modules become stable and widely used in Node.js I think that we’ll stick with CommonJS style ☺️

[LinusU]

The vast majority of the code on Npm uses module.exports = ... and the correct way to import them are import ... = require('...'). Depending on how you have configured TypeScript or your bundler it might work with import ... from '...' also…

When I’m using import copyToClipboard from 'clipboard-copy' I’m getting:

index.ts:1:8 - error TS1192: Module '"/private/tmp/djaskd/node_modules/clipboard-copy/index"' has no default export.

1 import copy from 'clipboard-copy'
         ~~~~


Found 1 error.

If I pass --esModuleInterop to tsc it works. Do you have esModuleInterop in your tsconfig?

---

You can also see the difference in the output:

import copy from 'clipboard-copy'
copy('test')

becomes:

var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
var clipboard_copy_1 = __importDefault(require("clipboard-copy"));
clipboard_copy_1["default"]('test');

whilst,

import copy = require('clipboard-copy')
copy('test')

becomes

var copy = require("clipboard-copy");
copy('test');

In both cases the typings works correctly for me…