Detect when your site is visible to users

document.onvisibilitychange = function () {
          document.visibilityState === "visible"
             ? (document.title = "👋 Hello")
             : (document.title = "😟 Bye!");
       };

Có thể bạn đã miss một số snippets code

How to reverse an Array?

Reversing an array in JS is really simple with the standard array method. Like below

try/catch es10

An update for developer convience allows the use of try/catch without an explicit e Error reference in the catch call.

Await in a for loop

How to Await in a for loop

Random Number javascript

Object.keys và Object.getOwnPropertyNames