We published three minor releases right after 1.4.0
addressing build issues in different environments.
Socket.IO-client now includes the latest version of engine.io-client
Fixed an issue that was preventing bundling with webpack.
Socket.IO now adds support for NativeScript!
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.4.3/socket.io.min.js"></script>