Can multiple identical events be bound to an openlayers map?

the old-fashioned require.js,
used in current projects all bind events to openlayers.
in order to avoid binding an event to generate a large number of global variables,
now wants to bind events to each module.
will this affect performance?
(openlayers is version 4.0)

Openlayers html5 css html javascript
Sep.30,2021

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