我正在尝试从简单的 Remix 合约中获取浏览器控制台上记录的详细信息。 但是，当我尝试以下 html 时，我收到一条错误消息：
web3.eth.contract 不是一个函数
查看文档，我发现变化：
var RemixContract = web3.eth.contract([
为此：
var RemixContract = new web3.eth.Contract([
至少允许分配合约变量，但是我无法使用
RemixContract.at期望的输出是：能够在浏览器控制台上查看我的合同详细信息。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Deploy a Remix Contract</title>
<link rel="stylesheet" type="text/css" href="main.css">
<!--The following line contains the source of web3 in case it is not on the directory-->
<script src="https://cdn.jsdelivr.net/gh/ethereum/web3.js/dist/web3.min.js"></script>
</head>
<body>
<div>
<h1>Deploy a Remix Contract</h1>
</div>
<script>
// Connect to the web3 provider
if (typeof web3 !== 'undefined') {
web3 = new Web3(web3.currentProvider);
} else {
web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:7545"));
}
// Set a default account
web3.eth.defaultAccount = web3.eth.accounts[0];
// Get the contract abi
// To get the contract ABI from Remix, go to the Compile tab and grab the ABI
var RemixContract = web3.eth.contract([
{
"constant": false,
"inputs": [
{
"name": "x",
"type": "string"
}
],
"name": "setMessage",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "getMessage",
"outputs": [
{
"name": "",
"type": "string"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
}
]);
// Get the contract address
var myMessage = RemixContract.at('0xd9145CCE52D386f254917e481eB44e9943F39138')
console.log(myMessage);
</script>
</body>
</html>
找到答案，我使用的是 web3 的旧语法，我应该替换它：
// Get the contract address
var RemixContract = web3.eth.contract(CONTRACT-ABI-HERE);
// Get the contract abi
var myMessage = RemixContract.at('CONTRACT ADDRESS HERE');
console.log(myMessage);
这样：
var RemixContract = new web3.eth.Contract(CONTRACT-ABI, CONTRACT ADDRESS);
console.log(RemixContract)
按照您的路径，接下来您将很难尝试使用新创建的合约调用 setMessage() 函数。 如果我们在同一页面上，请尝试以下代码，它节省了我大量的时间：
web3.eth.getAccounts().then(function(accounts){
web3.eth.defaultAccount = accounts[0]
var myContract = new web3.eth.Contract(contractABI, contractAddress);
myContract.methods.setMessage('your-new-message').send({from: accounts[0]});
myContract.methods.getMessage().call().then(console.log);
});