js execute something after delay code example

Example 1: javascipt delay

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

console.log("Hello");
sleep(2000).then(() => { console.log("World!"); });

Example 2: settimeout function

setTimeout(function(){ 
$('#overlay'). modal('hide') 
}, 5000);
//#overlay will be the ID of modal which you want to hide or show modal