Firefox Desktop and Chrome both have a minimum timeout of 1 second for inactive tabs.The specifics of this are browser-dependent: It may also be waived if a page is playing sound To reduce the load (and associated battery usage) from background tabs, browsers will enforceĪ minimum timeout delay in inactive tabs. log ( 'this is the first message' ) }, 5000 ) setTimeout ( ( ) => Timeouts in inactive tabs param1, …, paramN OptionalĪdditional arguments which are passed through to the function specified byĬonsole.

Note that in either case, the actual delay may be longer than intended see Reasons for delays longer than specified below.Īlso note that if the value isn't a number, implicit type coercion is silently done on the value to convert it to a number - which can lead to unexpected and surprising results see Non-number delay values are silently coerced into numbers for an example. Is used, meaning execute 'immediately', or more accurately, the next event cycle. If this parameter is omitted, a value of 0 The specified function or code is executed. The time, in milliseconds that the timer should wait before Recommended for the same reasons that make using Which is compiled and executed when the timer expires. codeĪn alternative syntax that allows you to include a string instead of a function, SetTimeout() accepts time in milliseconds, so setTimeout(fn, 1000) tells JavaScript to call fn after 1 second.A function to be executed after the timer expires. To delay a function execution in JavaScript by 1 second, wrap a promise execution inside a function and wrap the Promise's resolve() in a setTimeout() as shown below.

Javascript wait 5 seconds