Last week I've spent a full day to fix very strange behavior in a single page application for my customer that only happens on Chrome 51 (maybe 52, but not in Canary 53). After a while our SPA started behaving incorrectly... It turned out to be a nasty bug in the V8 JIT engine. Try the following in Chrome's developer console: function foo() { return typeof null === "undefined"; } for(var i=0; i<10

