# EventChannel.off(string eventName, function fn)

Start from base library version 2.7.3. Please remaining backward compatible.

with Promise style call: Not supported

Mini Program plugin: Support

Cancel listening on an event. When the second argument is given, cancel only the given listener function, otherwise cancel all listener functions

# parameter

# string eventName

Event Name

# function fn

Event listener function

# parameter

# any args

Trigger event parameter

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