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With weakmap the pattern becomes a lot easier:
var handlerMap = new WeakMap(); var escapeEventDefinition = { defaultEventType: 'escape', addEventListener: function (target, eventType, handler) { var keyHandler = function (event) { if (event.keyCode === 27 || event.key === 'Escape') { return handler.apply(this, arguments); } }; handlerMap.set(handler, keyHandler) this.addEventListener(target, baseEventType, keyHandler); }, removeEventListener: function (target, eventType, handler) { this.removeEventListener(target, baseEventType, handlerMap.get(handler)); } }
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With weakmap the pattern becomes a lot easier:
The text was updated successfully, but these errors were encountered: