ES-6
    1. Constants
        1. Constants
    2. Scoping
        1. Function Scoping
        2. Variable Scoping
    3. Arrow Function
        1. Expression
        2. Statement
        3. this
    4. Parameter Handling
        1. Default Parameter
        2. Rest Parameter
        3. Spread Operator
    5. Template Literals
        1. Raw literals
        2. String Interpolation
    6. Extended Literals
        1. Binary-Octal
        2. Unicode
    7. Object Properties
        1. Object Properties
    8. Destructuring Assignment
        1. Array Matching
        2. Defaults
        3. Fail Soft
        4. Functions
        5. Object Matching
    9. Modules
        1. Exporing Modules (math.js, mathplus.js)
        2. Importing (app1.js, app2.js, app3,js) 
    10. Classes
        1. Classes, Methods (static and non static), Inheritances
    11. Symbol
        1. Iterators
        2. Symbol
    12 Generators
        1. Generators
    13 Map/Set And WeakMap/WeakSet
        1. Map
        2. Set
    14 Built in Methods
        1. Array Search
        2. Number Comparision
        3. Number Type Checking
        4. Object Property Assignment
        5. Repeat String
        6. String search
    15 Promises
        1. Promise Combination
        2. Usage
    16 Meta Programming
        1. Proxying
        2. Relfection
    17. Internationalization & Localization
        1. Collation
        2. Currency Formatting
        3. Date/Time Formatting
        4. Number Formatting

ES-7
    1. Array Proto Types
    2. Exponentials

ES-8
    1. Objects
    2. String Padding
    3. Async-Await

ES-9
    1. Async Interactions
    2. Finally in Promises
    3. Rest Spread Properties

Es-10
    1. Array.flat() function
    2. Array.flatMap() function
    3. Object.fromEntries() function
    4. String.trimStart() and String.trimEnd() functions
    5. Try Catch Binding
    6. Function().toString()
    7. Symbol.description