Javascript ES6 TypeError: Class constructor Client cannot be invoked without 'new'

Question

I have a class written in Javascript ES6. When I try to execute nodemon command I always see this error TypeError: Class constructor Client cannot be invo

Answer 1

In package.json you can use targets configuration with @babel/preset-env. set the esmodules as 'true'.

Below is the example how I am using in my file:

  "babel": {
    "presets": [
      [
        "@babel/preset-env",
        {
          "targets": {
            "esmodules": true
          }
        }
      ],
      "@babel/preset-react",
      "@babel/preset-flow"
    ],
    "plugins": [
      "@babel/plugin-proposal-class-properties"
    ]
  },