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Versions: 170
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Contents
module Browser
module EventTarget
# Add the block as a handler for the specified event name. Will use either
# `addEventListener` or `addListener` if they exist.
#
# @param event_name [String] the name of the event
# @return [Proc] the block to pass to `off` to remove this handler
# @yieldparam event [Browser::Event] the event object
def on event_name, &block
wrapper = proc { |event| block.call Event.new(event) }
if `#@native.addEventListener !== undefined`
`#@native.addEventListener(event_name, wrapper)`
elsif `#@native.addListener !== undefined`
`#@native.addListener(event_name, wrapper)`
else
warn "[Browser] Not entirely sure how to add an event listener to #{self}"
end
wrapper
end
# Remove an event handler
#
# @param event_name [String] the name of the event
# @block the handler to remove, as returned from `on`
def off event_name, &block
if `#@native.removeEventListener !== undefined`
`#@native.removeEventListener(event_name, block)`
elsif `#@native.removeListener !== undefined`
`#@native.removeListener(event_name, block)`
else
warn "[Browser] Not entirely sure how to remove an event listener from #{self}"
end
nil
end
end
end
Version data entries
170 entries across 170 versions & 2 rubygems