Does Events Handlers in JavaScript for one event fired as FIFO, LIFO or in parallel?
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It’s very simple. DOM Level 2 Events module does not specify order in which event listeners are to be fired. However, DOM Level 3 Events module does specify order to be the same as registration one. First registered — first fired. Note that DOM Level 3 Events module is still a draft, whereas Level 2 one is a recommendation. Nevertheless, modern browsers often follow semantics of exactly this draft Level 3 specification, instead of an older Level 2 one. In practice, IIRC, only IE doesn’t respect order of event listeners. All other browsers implement it as FIFO (and as described in DOM L3 Events).
