In this article going to show what exactly abstruction and implementation in javaScrip

In a simple word abstraction is way of hiding complexity and internal details and showing the essential features of the user.

Example

class Bank {

  constructor(customerName, deposit, month) {
    this.customerName = customerName;
    this.deposit = deposit;
    this.timeInMonth = month;
    this.interest = 0;
  }

  checkAccountInfo() {

    this.calculateInterest();

    console.log(
      `Customer name: ${this.customerName} - deposit: ${this.deposit} - after ${this.timeInMonth} months - interest: ${this.interest}`
    );

  }

  calculateInterest() {

    switch (this.timeInMonth) {
      case 6: {
        this.interest = this.calculatePercent(20);
        break;
      }
      case 8: {
        this.interest = this.calculatePercent(30);
        break;
      }
      case 12: {
        this.interest = this.calculatePercent(50);
        break;
      }
      default: {
        this.interest = 0;
      }
    }

  }

  calculatePercent(percent) {
    return Math.floor((percent / 100) * this.deposit);
  }

}

const ob = new Bank(`Mahbub Hasan`, 50000, 6);
ob.checkAccountInfo();