JS setTimeout won't wait using Scratchpad

Question

Consider the following script

 function func() { alert('b'); if (document.readyState != 'complete') setTimeout(func(),1000); else alert('a'); }; window.location.replace('https://www.google.com/'); setTimeout(func(),5000); 

When I run the script, I get an alert immediately without waiting 5 seconds.

Answer 1

You need to remove the brackets from func:

 setTimeout(func,5000);

Otherwise the function is called immediately rather than being passed as a function to be called later.

 function func() { alert('b'); if (document.readyState != 'complete') setTimeout(func,1000); else alert('a'); }; setTimeout(func,5000);