Using Gremlin client in Angular (TypeScript) app results in "crypto.randomBytes is not a function"

[Devin Bost]

I am attempting to use the Gremlin client in an Angular app, and all I am attempting to do (so far) is create a simple connection and return some vertices, like this:

getVerticesTest() {
  const traversal = gremlin.process.AnonymousTraversalSource.traversal;

  const g = traversal().withRemote(
    new DriverRemoteConnection('ws://localhost:8182/gremlin'));
  const vertices = g.V().valueMap();
  return vertices;
}

However, when I trigger this method, here's what happens:

CanvasComponent.html:5 ERROR TypeError: crypto.randomBytes is not a function
    at WebSocket.initAsClient (WebSocket.js:541)
    at new WebSocket (WebSocket.js:72)
    at Connection.open (connection.js:120)
    at new Connection (connection.js:102)
    at new Client (client.js:47)
    at new DriverRemoteConnection (driver-remote-connection.js:53)
    at GremlinService.push../src/app/services/gremlin.service.ts.GremlinService.getVerticesTest (gremlin.service.ts:13)
    at CanvasComponent.push../src/app/components/canvas/canvas.component.ts.CanvasComponent.onClickMe (canvas.component.ts:43)
    at Object.eval [as handleEvent] (CanvasComponent.html:5)
    at handleEvent (core.js:23107)

Does this library have outdated dependencies? How do I use it?

(BTW, I am fully aware that my method leaks memory. I will fix that once I can establish a basic connection.)

[Stephen Mallette]

I'm not sure this is completely your problem but I don't think gremlin-javascript works too well with angular. someone started this PR to fix that but it was never quite completed unfortunately:

https://github.com/apache/tinkerpop/pull/1070  

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