Multiple forms causing possible EventEmitter memory leak console warning

[Anonymous]

I am working on a project that entails putting two different marketo forms on the same page.  This is resulting in the following console error:

     (node) warning: possible EventEmitter memory leak detected. 11 listeners added. Use emitter.setMaxListeners() to increase limit.

The console trace points to marketo's form2 js file.  I have even tried removing every event listener on my end just to be sure.

Anyone have any ideas?

Thanks.

[SanfordWhiteman · Accepted solution]

You have to link to your code.

The error is pretty accurate: a userland event management library (EventEmitter, developed I think originally by Joyent) is used by Forms2. Unlike native browser events, EE tries to be aware of when a stack limit is reached, sometimes creating unnecessary worry.

[Anonymous]

Turned out there were too many calls to MktoForms2.whenReady().

[SanfordWhiteman]

Right, you can almost always combine those event listeners (just seek the form ID in the listener).