ReferenceError with Node.js and Browserify
Question
I try to include this build , in my browser JS with Node.js, here is my server code:
var fs = require("fs");
var http = require("http");
var url = require("url");
http.createServer(function (request, response) {
var pathname = url.parse(request.url).pathname;
console.log("Request for " + pathname + " received.");
response.writeHead(200);
if(pathname == "/") {
html = fs.readFileSync("views/index.html", "utf8");
response.write(html);
} else if (pathname == "/ethereumjs-all.js") {
script = fs.readFileSync("views/ethereumjs-all.js", "utf8");
response.write(script);
}
response.end();
}).listen(8000);
console.log("Listening to server on 8000...");
and here is the content of index.html :
<html>
<head>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
<script src="/ethereumjs-all.js"></script>
<script>
$(document).ready(function() {
var tx = new Transaction()
...
}); // document.ready
</script>
</head>
<body></body>
</html>
However, in the browser console, I get the error ReferenceError: Transaction is not defined The library should have Transaction class defined. So am I using browserify wrong?
Thanks for any help!
1 answers
solution1
1 ACCPTED 2016-12-14 08:58:17
From your question, it appears that you are not using Browserify directly; rather, you are using a UMD bundle that has been built using Browserify.
When a UMD bundle is included in a script element, its module is exposed via a global - a property added to window . In this case the global/property is named EthJS . If you log that using console.log(EthJS) , you should see this:
Object
ABI:()
Account: function (data)
BN: function BN(number, base, endian)
Block: function (data)
Buffer: function Object
ICAP: function Object
RLP: function Object
Trie: function CheckpointTrie()
Tx: function (data)
Units: Object
Util: Object
VM: function VM(trie, blockchain, opts)
Wallet: function (priv, pub)
WalletHD: function EthereumHDKey()
WalletThirdparty: Object
Which suggests that the transaction constructor is named Tx , so your code should likely be:
<script>
$(document).ready(function() {
var tx = new EthJS.Tx(...);
...
}); // document.ready
</script>
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