If you want to reset all interval jobs when a browser tab is inactive, the best way would be to use clearInterval on window blur. But unfortunately Chrome fires window focus and window blur two times. Here is an embryo to a solution: var M = window.M || {}; M.counter = 0; M.focused = true; M.tick = function() { if (M.focused) { console.log("tic tac " + ++M.counter); } }; M.start = function(e) { console.