Got this error when trying to run node server

Question

I am using Linux mint. My node version is 9.4 and nmp version is 5.6

See the error i got when run "node server"

/var/www/html/mean/firstapp/server.js:1
(function (exports, require, module, __filename, __dirname) { import mongoose from 'mongoose';
                                                              ^^^^^^

SyntaxError: Unexpected token import
    at new Script (vm.js:51:7)
    at createScript (vm.js:138:10)
    at Object.runInThisContext (vm.js:199:10)
    at Module._compile (module.js:624:28)
    at Object.Module._extensions..js (module.js:671:10)
    at Module.load (module.js:573:32)
    at tryModuleLoad (module.js:513:12)
    at Function.Module._load (module.js:505:3)
    at Function.Module.runMain (module.js:701:10)
    at startup (bootstrap_node.js:193:16)

Generally i am getting this error from MongoDB

MongoDB shell version v3.6.2
connecting to: mongodb://127.0.0.1:27017/
MongoDB server version: 3.6.2
Welcome to the MongoDB shell.
For interactive help, type "help".
For more comprehensive documentation, see
    http://docs.mongodb.org/
Questions? Try the support group
    http://groups.google.com/group/mongodb-user
Server has startup warnings: 
2018-01-31T11:15:50.975+0530 I CONTROL  [initandlisten] 
2018-01-31T11:15:50.975+0530 I CONTROL  [initandlisten] ** WARNING: Access control is not enabled for the database.
2018-01-31T11:15:50.975+0530 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.
2018-01-31T11:15:50.975+0530 I CONTROL  [initandlisten] 
2018-01-31T11:15:50.975+0530 I CONTROL  [initandlisten] 
2018-01-31T11:15:50.975+0530 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2018-01-31T11:15:50.975+0530 I CONTROL  [initandlisten] **        We suggest setting it to 'never'
2018-01-31T11:15:50.975+0530 I CONTROL  [initandlisten] 
2018-01-31T11:25:28.254+0530 E -        [main] Error loading history file: FileOpenFailed: Unable to fopen() file /home/ranjit/.dbshell: No such file or directory

score 2 · Answer 1 · answered Jan 25 '18 at 10:35

2

Imports, also known as ES modules are not natively supported by node. Node uses CommonJS by default (require).

Node 9 does now support ES modules but it's behind a flag.[1]

To use your server.js with ES modules you need to rename it to server.mjs and launch it like this:

node --experimental-modules server.mjs

[1] https://nodejs.org/api/esm.html

answered Jan 25 '18 at 10:35

Pandelis

1,854
13
20

It is still giving error as i tried this . I rename the server.js to server.mjs and run the command written above – Ranjit Jan 25 '18 at 10:39
what is the error – Pandelis Jan 25 '18 at 10:43

score 1 · Accepted Answer · answered Jan 25 '18 at 10:33

1

import is not supported syntax for CommonJS module system in node.

You either use require, or transpile your Node.js code with something like babel-node.

https://babeljs.io/docs/usage/cli/#babel-node

answered Jan 25 '18 at 10:33

CharlieBrown

4,143
23
24

Should i change in all the files where it is written import ? – Ranjit Jan 25 '18 at 10:42
Yes you should, or use babel. Read the linked docs. – CharlieBrown Jan 25 '18 at 10:44

Got this error when trying to run node server

2 Answers2