Ably FAQs

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Ably FAQs

Realtime API and client libraries

Realtime API and client libraries

Common questions and issues with the Realtime API

Platform support

How do I use Ably with an Arduino, or some other c/c++ platform?

ably-js page unload behaviour

How to adjust the realtimeRequestTimeout to a higher value (on ably-js)

Which browsers do you support with your Javascript library?

Connections

Can a single connection be shared across multiple browser tabs?

How can I see who is connecting to my app?

Why is my Ably realtime connection sometimes disconnecting and reconnecting?

Optimising Ably connections to minimize battery usage

Is a connection ID globally unique?

Should I monitor for non-2xx network requests to identify issues?

Will I receive an error if a client publishes with the connection in the Failed, Disconnected or Suspended states?

Can I change my connection's clientId after connecting?

How can I use ably-js session recovery over a page reload when I have multiple SDK instances for the same origin?

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Common issues

Why am I seeing every message multiple times?

"CORB blocked cross-origin response" error when using ably-js from a contentScript scope in a Chrome extension in Chrome 73+

Why are my concurrent connection counts higher than expected?

SSL certificate issues communicating with Ably

Warning about "setting a timer for a long period of time" when using ably-js-react-native on android

When I try installing ably-js with npm, I get " Error while executing: /usr/bin/git ls-remote -h -t https://github.com/ably-forks/msgpack-js.git"

ClassNotFoundException when using Proguard with ably-java

Using ably-js-react native, connection attempts or rest requests appear to timeout immediately

Why am I seeing a build error TypeError: Cannot read properties of undefined (reading 'sqrt') when using Ably-js with Next.js

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Authentication

Is it necessary to implement auto-renewal of tokens when using Token Auth?

Is it possible to dynamically change the channels a user has access to without disconnecting?

Can an existing connection's token capabilities be upgraded or downgraded?

Do you have a max TTL for tokens?