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Knockout Observables & Maps

I’ve used Knockout.js quite a bit, I was looking at some code and come across an interesting situation. I saw a JS Map object being put into a KO observable which got me thinking. Does Knockout actually support that? Will subscriptions trigger? I hypothesized that they would not, but I had to test it. See the Pen KO Observables - Maps by Jason Butz (@jasonbutz) on CodePen. Turns out Knockout doesn’t detect changes to the Map, just like if you edit an object contained in an observable the change won’t be detected.