TypeError: Cannot read property 'setDefault' of undefined in momentjs,, moment.tz()

Question

I have an JS file in a npm enviornment and it and its associated package.json is given below. I receive the following ERROR, while running the file 'app.js'.

TypeError: Cannot read property 'setDefault' of undefined

I am not able to access moment.tz() as it is getting the value of undefined.

app.js

import moment from "moment";

moment.tz.setDefault(moment.tz.guess());
console.log(moment().tz());

package.json

  "name": "folder_name_here",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "type": "module",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "moment": "^2.29.1",
    "moment-timezone": "^0.5.33"
  }
}

Answer 1

You should import from moment-timezone rather than moment.

import moment from "moment-timezone";

Also, there's very little reason to do moment.tz.setDefault(moment.tz.guess()); because the default time zone is already understood by Moment. If that's your only reason for using Moment-Timezone, then don't - just use Moment by itself.