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MooToolsModule = ->
# Data key to use for storing a reference to the chart instance on an element.
DATA_NAME = 'epoch-chart'
# Adds an Epoch chart of the given type to the referenced element.
# @param [Object] options Options for the chart.
# @option options [String] type The type of chart to append to the referenced element.
# @return [Object] The chart instance that was associated with the containing element.
Element.implement 'epoch', (options) ->
self = $$(this)
unless (chart = self.retrieve(DATA_NAME)[0])?
options.el = this
klass = Epoch._typeMap[options.type]
unless klass?
Epoch.exception "Unknown chart type '#{options.type}'"
self.store DATA_NAME, (chart = new klass options)
return chart
MooToolsModule() if window.MooTools?
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