Actual-events

try using try-catch and throw for verbose simplification.
in try-catch you can use the error in catch to get the error.name, error.message , error.stack
try catch also has finally which
1. After try or catch executes the statement inside finally
2. It can also bypass return - meaning if inside a function and you return after try or catch - normally you'd exit the function but using finally you exit AND execute the statements in the finally clause

This div only prints random numbers above 5 withing 10:

[check console for other wise]

OOPS

And object can inherit the properties of another object by rabbit.__proto__=animal. where the rabbit inherits the protypes from animal.
Its a non standard way of setting prototypes.
This is deprecated in favor of Object.getPrototypeOf() and Object.setPrototype.Of()
Use extends instead since you cannot use super with __proto__
This also slows down the performance and introduces bugs.
Engine optimises class-based code better .
A constructor in js is something that is used for initialising an object.
It is a function named constructor.

We can use the this keyword such as:

    
class User {

    constructor(name) {
      // invokes the setter
      this.name = name;
    }
  
    get name() {
      return this._name;
    }
  
    set name(value) {
      if (value.length < 4) {
        console.log("Name is too short.");
        return;
      }
      this._name = value;
    }
  
  }
  
  let user = new User("John");
  console.log(user.name); // John
  
  user.name = "Harry" // Name is too short.
  console.log(user.name)

keywords

Extends

This will help to inherit the other class and use super and this keyword on it.

Overrides

We use this for overriding a super function [ inherited function ] by our own function.

super

Super keyword is used to access the element of a parent class.

static

Used to implement function that belong to the class as a whole and not to any particular object.

getter-setter

Are used to get and set some of the default attributes of a class so that other users /unauthorised/ are not able to access the class with unforeseen values.

instanceOf

This operator returns a boolean on weather a object is a child/inherits the speified class