Answers for "how to have delay in javascript"

delay in javascript

setTimeout(function() {
 //your code here
}, 1000);

javascript adding delay

//You have to wait for TypeScript 2.0 with async/await for ES5 support as it now supported only for TS to ES6 compilation.
//You would be able to create delay function with async:

function delay(ms: number) {
    return new Promise( resolve => setTimeout(resolve, ms) );
}

//And call it
await delay(300);