Question

我正在尝试为我的固定合同建立UI。到目前为止，文件如下：

index.html : which contains ui part(tables, buttons, etc)

    server.js:

        var express = require('express');
        var app = express();
        app.use('/', express.static(__dirname + '/'));
        app.listen(8080,() => console.log('Example app listening on port 8080!'));

    index.js:
    web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
    abi = JSON.parse('[{"constant":true,"inputs"......');
    // In your nodejs console, execute contractInstance.address to get the address at which the contract is deployed and change the line below to use your deployed address
    VotingContract = web3.eth.contract(abi);
    contractInstance = VotingContract.at('deployed address name');
    //rest of the functions required..

Solidity file: this contains the contract that will deployed on the blockchain

当我在本地主机上运行服务器时，出现错误，提示未定义web3。谁能帮我这个？？谢谢！！！

Answer 1

我找到了答案。我只需要在server.js文件中包含web3：

var express = require('express');
var Web3 = require('web3');

使用javascript，solidity和html时Web3模块未定义的错误

1 个答案: