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Check that a button mapping is defined before accessing it

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Tissevert 2018-12-29 14:45:47 +01:00
parent c05296fda4
commit 559b180a14
1 changed files with 1 additions and 1 deletions
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2
src/js/buttons.js
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@ -14,7 +14,7 @@ function Buttons(session) {
document.addEventListener('keydown', function(event) { document.addEventListener('keydown', function(event) {
var button = session.get('options').layout[event.key]; var button = session.get('options').layout[event.key];
if(button != undefined && mapping[button] != undefined) { if(button != undefined && mapping != undefined && mapping[button] != undefined) {
event.preventDefault(); event.preventDefault();
mapping[button](); mapping[button]();
} }