Modern JavaScript refers to the current best practices and techniques used in writing JavaScript code. It is set of standards and features that have been developed to improve the language’s functionality, usability and maintainability. Modern JavaScript includes features that were introduced in ECMAScript 6 (ES6) and subsequent versions also known as ECMAScript 2015 and onwards.

Some of the features of modern JavaScript include:

1. Arrow functions: More concise syntax for defining functions.
2. Classes: Newew syntax for creating object oriented programming (OOP) patterns.
3. Template literals: New way to define strings with interpolated variables and expressions.
4. Destructuring: Shorthand syntax for extracting values from arrays and objects.
5. Spread syntax: New way to spread an array or object into individual elements.
6. Promises: Cleaner and more maintainable way to handle asynchronous operations.
7. Async/await: More readable way to write asynchronous code that works with Promises.
8. Modules: Standardized way to organize and reuse code across multiple files and projects.

In addition to the above features modern JavaScript also includes best practices such as using let and const for variable declaration, avoiding global variables using strict mode and avoiding callback hell.

By using modern JavaScript features and best practices, developers can write cleaner, more maintainable code that is easier to read and understand, and can help them be more productive and efficient in their work. In this Modern JavaScript Videos you will learn different concepts.