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Ignore spurious canExecute changes #49

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Ignore spurious canExecute changes #49

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5 changes: 3 additions & 2 deletions knockout.command.js
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,8 @@
executeDelegate = options.execute;

self.canExecute = ko.computed(function() {
return canExecuteDelegate ? canExecuteDelegate() : true;
//Force chatty canExecuteDelegate() to boolean to avoid pointless update of subscribers (i.e. activity)
return canExecuteDelegate ? !!canExecuteDelegate() : true;
});

self.execute = function (arg1, arg2) {
Expand Down Expand Up @@ -57,7 +58,7 @@
self.isExecuting = ko.observable();

self.canExecute = ko.computed(function() {
return canExecuteDelegate ? canExecuteDelegate(self.isExecuting()) : !self.isExecuting();
return canExecuteDelegate ? !!canExecuteDelegate(self.isExecuting()) : !self.isExecuting();
});

self.execute = function (arg1, arg2) {
Expand Down