in typescript error

[wildfire810]

reconnecting_websocket_1.default is not a constructor

[pladaria]

can you provide a sample code to reproduce this issue?

[hanjukim]

Node v12.16.3 TypeScript v4.0.2

tsconfig.json

{
  "compilerOptions": {
    "target": "es2017",
    "module": "commonjs",
    "allowJs": false,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "allowSyntheticDefaultImports": true,
    "moduleResolution": "node",
    "skipLibCheck": true,
    "strictNullChecks": true,
    "sourceMap": true,
    "baseUrl": "src",
    "sourceRoot": "src",
    "outDir": "dist",
  },
  "include": [
    "src/**/*.ts"
  ],
  "exclude": [
    "node_modules",
    "dist"
  ]
}

Source

import ReconnectingWebSocket from 'reconnecting-websocket';

console.log(ReconnectingWebSocket); // undefined

@pladaria I am having this problem too.

[hanjukim]

const ReconnectingWebSocket = require('reconnecting-websocket');

require is working btw.

[davidzwa]

I experience the same issue.

[houtenbos]

I fixed it by adding the following option to tsconfig.json in my project: "esModuleInterop": true

[stalker8610]

In my case "esModuleInterop": true didn't help, but this did:

import ReconnectingWebSocket from 'reconnecting-websocket';
let rws: ReconnectingWebSocket.default;
rws = new (ReconnectingWebSocket as any)(connectionString, [], options);