Uncaught ReferenceError: require is not defined

[shivansh-narayan]

var Web3 = require("Web3");

I have downloaded the web3 modules using npm but the above statement in my HTML code is still showing error

[michaelsbradleyjr]

try:

var Web3 = require('web3');

The package name starts with a lower case w.

[shivansh-narayan]

@michaelsbradleyjr still the same

[michaelsbradleyjr]

@narayanshivansh49 are you using some front-end build tooling like webpack? Do you have a repository I can look at?

[nivida]

Using of a bundler is required if you install it from NPM. The minified file can be found here on GitHub in the dist folder.

[myq]

@nivida The minified file in the dist folder still contains the call to require(), so it can't be used in a browser (as of version 1.2.4).

What is the best way for me to generate a minified version of 1.2.4 that works?

[michaelsbradleyjr]

@myq I tried uploading web3.min.js from the dist/ folder on the 1.x branch to codesandbox and then making use of it in a sandbox with:

<script src="https://uploads.codesandbox.io/uploads/user/68052bd8-43d7-466a-af1e-bb0ab2bd3a40/F6-W-web3.min.js"></script>

It seems to work fine, i.e. in the browser console I can see there is indeed a global variable named Web3 and web3 = new Web3() works.

[alcuadrado]

@cgewecke fixed this in #3261, so cloning the repo and building the minified version should work.

I'm not sure if the minified file in dist/ should be updated before a new release though. Should it track the latest released version? I normally don't push autogenerated files, so I'm not sure what's common in this case.

[MukeshJaiswal01]

sir , i'm getting same problem
this is my code -->

<title>first dapp</title> <script src="https://cdn.jsdelivr.net/npm/web3@latest/dist/web3.min.js"></script>

<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" integrity_no="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">

First Smart Contract

<script type=""> var Web3 = require('web3'); var web3 = new Web3('http://localhost:8545'); var conrtract_abi = [{ "constant": false, "inputs": [ { "internalType": "string", "name": "My_Message", "type": "string" } ], "name": "put", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "getvalue", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" } ]; var contact_address = '0x62Fbd0989fbc743dDF11DA5b18e34d9Ffc59a199'; var simple_contract = new Web3.eth.Contract(conrtract_abi, contact_address); console.log(simple_contract) Web3.eth.getAccounts().then(console.log); </script>