function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
console.log("Hello");
sleep(2000).then(() => { console.log("World!"); });
var output = "";
// Start timing now
console.time("concatenation");
for (var i = 1; i <= 1e6; i++) {
output += i;
}
// ... and stop.
console.timeEnd("concatenation");
<button onclick="setTimeout(myFunction, 3000)">Try it</button>
<script>
function myFunction() {
alert('Hello');
}
</script>document.getElementById("gameStart").addEventListener("click", function(){
var timeleft = 15;
var downloadTimer = setInterval(function function1(){
document.getElementById("countdown").innerHTML = timeleft +
" "+"seconds remaining";
timeleft -= 1;
if(timeleft <= 0){
clearInterval(downloadTimer);
document.getElementById("countdown").innerHTML = "Time is up!"
}
}, 1000);
console.log(countdown);
});