Name: Expert Javascript Interview Preparation
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Author: ashutoshsarangi

Expert Javascript Interview Preparation

1. What are tradeoff in Event Delegation
2. What are Workers
3. Web Storage
4. HTTP methods
5. Browser Apis
6. IndexDb
7. Web Storage Capacity, not Local Storage and Session Storage.
8. Types of Observer
9. Intersection Observer
10. Service Worker and WebWorker
Ans:- https://dev.to/ashutoshsarangi/web-worker-vs-service-worker-5h50
11. Event Bubbling and Event Captureing, default argument and syntax, eventListner
12. PWA
13. background sync

14. High Performance
Browser Networking

http1 vs http2
Server Send Events
webRTC
polling → long polling vs short polling
WebSocket
sockett.io

15. debounce Vs Thruttling

const debFun = (fn, delay = 200) => {
 let timeCounter;
 return (...args) => { 
   if (timeCounter) { 
     clearTimeout(timeCounter);
   }
   timeCounter = setTimeout(() => { 
           fn(...args);
           timeCounter = null;
   }, delay); 
 };
 };

const print = () => console.log('Hello');
const testFun = debFun(print);

setInterval(() => { testFun(); }, 300);

function throttle(fn, delay) {
  let lastCall = 0;
  return function(...args) {
    const now = new Date().getTime();
    if (now - lastCall < delay) {
      return;
    }
    lastCall = now;
    return fn(...args);
  };
}

const print = () => console.log('Hello');

const throttledPrint = throttle(print, 200);

setInterval(() => {
  throttledPrint();
}, 100);