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javascriptfunctionsettimeoutstack-overflow

Does Self-Invoke JavaScript function will causes stack overflow exception

Here I have a function that calls itself within a setTimeout callback function: 

function myFunc(){

    // ... I'm doing my jobs here...

    setTimeout(function(){
        myFunc() //self invoke
    },1)
}

myFunc(); // start point

Does this code eventually will occurs stack overflow exception?
Thanks in advance.

Solution

  • No. Functions queued via setTimeout are only run once the main thread (or whatever thread is currently in progress) is complete - there are no nested calls / nested environments that could cause the overflow you're worried about. If you run this snippet, you'll never run into an error, for example:

    function myFunc(i) {
  if (i % 1000 === 0) console.log(i);
  setTimeout(function() {
    myFunc(++i)
  })
}
myFunc(0);

    The same sort of thing is true for functions that invoke promises that call themselves recursively via .then - it's perfectly safe.