feat: add destroy method #1
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misterdev
commented
Oct 21, 2020
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| function _removeEvent (object, type, callback) { | ||
| if (object.removeEventListener) { | ||
| object.removeEventListener(type, callback, false); | ||
| return; | ||
| } | ||
| object.detachEvent('on' + type, callback); | ||
| } |
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This is the reverse of _addEvent that already exists
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| _addEvent(targetElement, 'keypress', self._handleKeyEvent); | ||
| _addEvent(targetElement, 'keydown', self._handleKeyEvent); | ||
| _addEvent(targetElement, 'keyup', self._handleKeyEvent); |
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This is inside mousetrap constructor, I useself._handleKeyEvent so that I can remove it on destroy
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| Mousetrap.prototype.destroy = function () { | ||
| var self = this | ||
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| self.reset() | ||
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| _removeEvent(self.target, 'keypress', self._handleKeyEvent); | ||
| _removeEvent(self.target, 'keydown', self._handleKeyEvent); | ||
| _removeEvent(self.target, 'keyup', self._handleKeyEvent); | ||
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| self.target = undefined | ||
| self._handleKeyEvent = undefined | ||
| } |
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Remove the listeners and clear the instance
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This is useful to provide a way to avoid memory leaks
See also ccampbell#428