Please update websockets to 2.0.0.

[Romick2005]

Can you please try to switch ws to 2.0.0-beta.1?

[aichholzer]

Please update.
There is something weird going on here with the current version of ws being used. It keeps throwing this error on incoming messages:

/node_modules/express-ws/node_modules/ws/lib/Receiver.js:306
if (mask != null && buf != null) bufferUtil.unmask(buf, mask);
TypeError: Cannot read property 'unmask' of undefined

the Receiver.js is doing this (line 11):

bufferUtil = require('./BufferUtil').BufferUtil

and BufferUtil.js does this:

try {
  module.exports = require('bufferutil');
} catch (e) {
  module.exports = require('./BufferUtil.fallback');
}

which results in the error since bufferutil.BufferUtil (as used in Receiver.js) does not exist.

This works as expected and the code is also doing the right thing in the latest ws version.

[HenningM]

Should be fixed in version 3.0.0.