setTimeout not working inside infinite loop

Question

    while(true){
        window.setTimeout(function() {
            myMethod()
        }, 15000);
        }
        function myMethod() {
            alert(\"repeat\         


        

Answer 1

but once I run the code my browser hangs

it will because you are endlessly creating setTimeout() requests by doing while(true) since it will not wait for 15 secs before doing next iteration of while

if you want to keep alerting something every 15 sec then try

window.setTimeout( myMethod, 15000);
function myMethod() 
{
    alert("repeat");
    window.setTimeout( myMethod, 15000);
}