Error when concatenating two streams

[coyotte508]

var fs = require("fs");
var StreamConcat = require("stream-concat");

var in1 = fs.createReadStream("a.jpg");
var in2 = fs.createReadStream("b.jpg");

StreamConcat([in1, in2]);

I get:

TypeError: dest.on is not a function
    at ReadStream.Readable.pipe (_stream_readable.js:582:8)
    at nextStream (/mnt/c/Users/coyot/code/.../node_modules/stream-concat/index.js:26:26)
    at StreamConcat (/mnt/c/Users/coyot/code/.../node_modules/stream-concat/index.js:31:3)
    at repl:1:1
    at ContextifyScript.Script.runInThisContext (vm.js:50:33)
    at REPLServer.defaultEval (repl.js:240:29)
    at bound (domain.js:301:14)
    at REPLServer.runBound [as eval] (domain.js:314:12)
    at REPLServer.onLine (repl.js:441:10)
    at emitOne (events.js:121:20)

I use node 9.2.

[sedenardi]

Hi there, sorry to hear you're having issues.

Without seeing all of your code, first thing I'd do is make sure you're using StreamConcat with the new keyword.

var fs = require("fs");
var StreamConcat = require("stream-concat");

var in1 = fs.createReadStream("a.jpg");
var in2 = fs.createReadStream("b.jpg");

var out = new StreamConcat([in1, in2]);

Additionally, I've just updated the project with some tests that may be of use. Let me know if you're still having troubles.

[coyotte508]

Right, that may be it. I went through the trouble of updating the code to ES6 and it worked - but probably because my compiler forced me to add the new keyword.

Thank you for your prompt response :)

[sedenardi]

Great, glad to hear you got it working.

I'll eventually release an ES6 class version as 2.0.0, but for now, it works well on all node versions, so I'm fine leaving it as is.