TypeError: Web3 is not a constructor

[provable-things]

TypeError: Web3 is not a constructor

[Oguntoye]

@james-stevens and anyone who is having this issues

From Web3.js 4.x

You should do this
const { Web3 } = require('web3');

Instead of doing this
const Web3 = require('web3');

[james-stevens]

#! /usr/bin/node

const myWeb3 = require("web3");
const web3 = new myWeb3("https://eth-mainnet.g.alchemy.com/v2/**************************");

web3.eth.ens.getContenthash("james.eth").then((result) => { console.log(result); });

gets....

const web3 = new myWeb3("https://eth-mainnet.g.alchemy.com/v2/I1iLOFKvcQ5NEt7GnYfmQDwXpYipWPaw");
             ^

TypeError: myWeb3 is not a constructor
    at Object.<anonymous> (/root/python/web3/web3.js:4:14)
    at Module._compile (node:internal/modules/cjs/loader:1254:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1308:10)
    at Module.load (node:internal/modules/cjs/loader:1117:32)
    at Module._load (node:internal/modules/cjs/loader:958:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:23:47

worked fine until I upgraded node from v16 to v18

Tried updating web3, tried removing it & reinstalling it - no luck

[james-stevens]

thanks @Oguntoye, I went with converting to module syntax

import { Web3 } from 'web3';
const web3 = new Web3("https://eth-mainnet.g.alchemy.com/v2/*****************");

I was just disappointed that code that had worked in node v16 then failed just by upgrading to node v18 - and ALL the tutorials I found online used to older syntax, that now doesn't work.

Getting anything working in web3 is hard enough - to then have it killed by an update was a killer.

[marcogiglio]

Hi @R-a-x , have you run npm install before?

[rahulbansal16]

@marcogiglio its hard to say, is there any way I can confirm that

[marcogiglio]

Probably not if you have this error. Just try to run it and see if it works?

[mandritac]

If you have executed npm install then a folder called "node_modules" should get created in your ethereum bridge extracted folder.

[Medha08]

I ran into the same issue,solved it by deleting package-lock.json, node_modules and doing npm install again. See if it works for you

[D-Nice]

stale issue

[AfnanQureshi1]

getting same error! anyone resolved it?