Removing Shims of Native Javascript

Using Concrete / Help
1

We’re trying to add a new chat service to our website and it is only working sporadically. Their support says we need to remove shims of native javascript. Is that safe to do?

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2

I’m struggling to figure out where this would be shimmed. addEventListener and removeEventListener have been supported in every browser for 10+ years. Concrete CMS only supports fairly modern browsers, so I’d be really surprised if there’s something in Concrete that contains a JavaScript shim for those methods.

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