Baseline Widely available *
Note: This feature is only available in Web Workers.
The setInterval() method of the WorkerGlobalScope interface repeatedly calls a function or executes a code snippet, with a fixed time delay between each call.
This method is also available in window contexts: for a detailed description of setInterval(), see the Window.setInterval() page.
setInterval(code)
setInterval(code, delay)
setInterval(func)
setInterval(func, delay)
setInterval(func, delay, arg1)
setInterval(func, delay, arg1, arg2)
setInterval(func, delay, arg1, arg2, /* â¦, */ argN)
func
A function to be executed every delay milliseconds. The first execution happens after delay milliseconds.
code
An optional syntax allows you to include a string instead of a function, which is compiled and executed every delay milliseconds. This syntax is not recommended for the same reasons that make using eval() a security risk.
delay Optional
The time, in milliseconds (thousandths of a second), the timer should delay in between executions of the specified function or code. Defaults to 0 if not specified. See Delay restrictions for details on the permitted range of delay values.
arg1, â¦, argN Optional
Additional arguments which are passed through to the function specified by func once the timer expires.
The setInterval() method returns a positive integer (typically within the range of 1 to 2,147,483,647) that uniquely identifies the interval timer created by the call. This identifier, often referred to as an "interval ID", can be passed to clearInterval() to stop the repeated execution of the specified function.
Within the same global environment (e.g., a particular window or worker), the interval ID is ensured to remain unique and is not reused for any new interval timer as long as the original timer is still active. However, different global environments maintain their own independent pools of interval IDs.
Be aware that setInterval() and setTimeout() share the same pool of IDs, and that clearInterval() and clearTimeout() can technically be used interchangeably. For clarity, however, you should try to always match them to avoid confusion when maintaining your code.
Note: The delay argument is converted to a signed 32-bit integer. This effectively limits delay to 2147483647 ms, roughly 24.8 days, since it's specified as a signed integer in the IDL.
See setInterval() for examples.
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