Event subscriptions #42
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Removes null and type checking on event targets we know to be correct.
Consolidates adding and removing listeners into a subscription pattern.
keithamus
approved these changes
Nov 11, 2019
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This branch expands the use of the event subscription pattern to handle removing all event listeners. There are enough listeners to warrant this now, and this would have prevented the copy/paste typo in #40 that should be calling
removeEventListener.In addition to listener cleanup, this binds listeners to the details and menu elements so they don't need to typecast or query the tree for them. The subscription pattern avoids tracking bound listener functions in the element's state so they may be deregistered later.