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add check for eventListenerCount

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This commit is contained in:
dkanada 2019-09-24 23:23:43 +09:00
parent 5104aabead
commit 4c3af5b9dd
1 changed files with 3 additions and 3 deletions
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6
src/components/inputManager.js
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@ -22,12 +22,12 @@ define(['playbackManager', 'focusManager', 'appRouter', 'dom'], function (playba
var eventListenerCount = 0; var eventListenerCount = 0;
function on(scope, fn) { function on(scope, fn) {
eventListenerCount++; if (eventListenerCount) eventListenerCount++;
dom.addEventListener(scope, 'command', fn, {}); dom.addEventListener(scope, 'command', fn, {});
} }
function off(scope, fn) { function off(scope, fn) {
eventListenerCount--; if (eventListenerCount) eventListenerCount--;
dom.removeEventListener(scope, 'command', fn, {}); dom.removeEventListener(scope, 'command', fn, {});
} }
@ -234,4 +234,4 @@ define(['playbackManager', 'focusManager', 'appRouter', 'dom'], function (playba
on: on, on: on,
off: off off: off
}; };
}); });