https://github.com/a-vis/spectrum/blob/8b018741162db662132aafddc8685030ad8a8e0f/core.js#L33 Should be `Emitter.call(this)`. Otherwise an `Cannot read property '_events' of undefined` error will be thrown at startup.
https://github.com/a-vis/spectrum/blob/8b018741162db662132aafddc8685030ad8a8e0f/core.js#L33
Should be
Emitter.call(this).Otherwise an
Cannot read property '_events' of undefinederror will be thrown at startup.