How to know if ko.applyBindings has been called?

[smartg...@gmail.com]

Hello all,

 

I'v noticed that calling twice ko.applyBindings could break the bindings mechanism.

 

So is there a way to know if ko.applyBindigs had been called using  a ko object or even the viewModel ?

 

A quick fix is using a variable that I set after calling the method, but that seems not that clean to me.

 

Any ideas,

 

Thx,

 

charly

 

 

[Hasen el Judy]

Sugar.js and underscore.js both offer wrappers that guarantee a function only gets executed once:

http://sugarjs.com/api/Function/once

Example (straight from the sugarjs docs):

var fn = (function() {
    // Will be executed once only 

}).once(); fn(); fn(); fn();

[smartg...@gmail.com]

I will check these frameworks out.

[Michael Best]

ko.dataFor or ko.contextFor, described at http://knockoutjs.com/documentation/unobtrusive-event-handling.html, will tell you whether an element or an ancestor has been "bound". But this will return a false positive for elements that aren't bound but have an ancestor that is.

So the answer is that there's no foolproof method.

-- Michael

[Hasen el Judy]

cool, then you can make this "foolproof" if you iterate on an elements parent until you reach the body element.

[Michael Best]

No, that what ko.contextFor does already, which is why it's not foolproof.

-- Michael