Error Require() of ES modules is not supported in Nodejs
Dung Do Tien
Jun 27 2022
564
Hi Dev guys, I have written a small NodeJs application. I want to fetch data from API and display it on the browser as a table. I installed node-fetch package and use it to fetch data from API. You can see it here:
index.js
const fetch = require('node-fetch');
var express = require('express');
var app = express();
app.get('/', async (req, res) => {
const result = await getUser();
console.log(result);
});
var server = app.listen(4500, function () {
console.log('Server is running..');
});
async function getUser() {
try {
const response = await fetch('https://randomuser.me/api/');
if (!response.ok) {
throw new Error(`Error! status: ${response.status}`);
}
const result = await response.json();
return result;
} catch (err) {
console.log(err);
}
}
I used node index.js command to run Node app, but I got an exception throw Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: "node-fetch\src\index.js". Require() of ES modules is not supported.
Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: C:\Users\conta\source\repos\NodeJs\Demo1\node_modules\node-fetch\src\index.js
require() of ES modules is not supported.
require() of C:\Users\conta\source\repos\NodeJs\Demo1\node_modules\node-fetch\src\index.js from C:\Users\conta\source\repos\NodeJs\Demo1\index.js is an ES module file as it is a .js file whose nearest parent packag
e.json contains "type": "module" which defines all .js files in that package scope as ES modules.
Instead rename C:\Users\conta\source\repos\NodeJs\Demo1\node_modules\node-fetch\src\index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from C:\Users\conta\source\repos\No
deJs\Demo1\node_modules\node-fetch\package.json.
←[90m at Object.Module._extensions..js (internal/modules/cjs/loader.js:1153:13)←[39m
←[90m at Module.load (internal/modules/cjs/loader.js:985:32)←[39m
←[90m at Function.Module._load (internal/modules/cjs/loader.js:878:14)←[39m
←[90m at Module.require (internal/modules/cjs/loader.js:1025:19)←[39m
←[90m at require (internal/modules/cjs/helpers.js:72:18)←[39m
at Object.<anonymous> (C:\Users\conta\source\repos\NodeJs\Demo1\index.js:1:15)
←[90m at Module._compile (internal/modules/cjs/loader.js:1137:30)←[39m
←[90m at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)←[39m
←[90m at Module.load (internal/modules/cjs/loader.js:985:32)←[39m
←[90m at Function.Module._load (internal/modules/cjs/loader.js:878:14)←[39m {
code: ←[32m'ERR_REQUIRE_ESM'←[39m
}
Here is my package.json file:
{
"name": "Demo1",
"version": "1.0.0",
"description": "",
"main": "index.js",
"dependencies": {
"dotenv": "^16.0.1",
"express": "^4.18.1",
"node-fetch": "^3.2.6"
},
"devDependencies": {},
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC"
}
Where am I going wrong?
Thank you in advance.
Have 2 answer(s) found.
-
L0
Lalan Kumar Jun 27 2022
Based on your
package.jsonfile, you are using node-fetch version 3. This version did not supportrequire('node-fetch')syntax.To solve this issue, you can:
Step1: add more
"type": "module"into yourpackage.jsonfile.{ ........ "type": "module", ........ }Step2: Change
const fetch = require('node-fetch');To
import fetch from "node-fetch";It'll be solved for you.
-
a0
amit Jun 27 2022
the error Require() of ES modules is not supported occurs because you installed node-fetch version 3 and you can downgrade and install version 2.
To install node-fetch version 2, run the command:
npm install node-fetch@2Your issue will be solved.
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