Ecmascript 2015 new features

ECMAScript 2015, also known as ECMAScript 6 (ES6), introduced several new features to the JavaScript language. Here are some of the most notable ones:

  1. Classes: ES6 introduced a new syntax for defining classes, which is similar to other object-oriented languages like Java or C#.
  2. Modules: ES6 introduced a new way of organizing code into modules, which allows for better code organization and reuse.
  3. Arrow Functions: ES6 introduced arrow functions, which are a concise way of defining functions.
  4. Promises: ES6 introduced the Promise constructor, which allows for asynchronous programming in a more readable and maintainable way.
  5. Generators: ES6 introduced generators, which are a way of defining functions that can be paused and resumed at specific points.
  6. Async/Await: ES6 introduced the async and await keywords, which allow for writing asynchronous code that is easier to read and maintain.
  7. Let and Const: ES6 introduced the let and const keywords, which allow for declaring variables with block scope.
  8. Template Literals: ES6 introduced template literals, which are a new way of defining strings that can include expressions and variables.
  9. Destructuring: ES6 introduced destructuring, which is a way of extracting values from arrays and objects into separate variables.
  10. Spread Operator: ES6 introduced the spread operator, which allows for expanding arrays and objects into separate arguments or properties.
  11. Rest Parameters: ES6 introduced rest parameters, which allow for defining functions that can take a variable number of arguments.
  12. Default Parameters: ES6 introduced default parameters, which allow for defining functions that have default values for their parameters.
  13. Symbol: ES6 introduced the Symbol data type, which is a unique and immutable value that can be used as a key in objects.
  14. Proxy: ES6 introduced the Proxy constructor, which allows for creating proxy objects that can intercept and modify the behavior of other objects.
  15. Reflect: ES6 introduced the Reflect object, which provides a way of accessing and manipulating the metadata of objects.
  16. WeakMap and WeakSet: ES6 introduced the WeakMap and WeakSet data structures, which are used for storing references to objects without preventing them from being garbage collected.
  17. Map and Set: ES6 introduced the Map and Set data structures, which are used for storing key-value pairs and collections of unique values, respectively.
  18. Number and String: ES6 introduced new methods and properties for the Number and String objects, such as Number.isFinite() and String.prototype.includes().
  19. Array: ES6 introduced new methods and properties for the Array object, such as Array.prototype.includes() and Array.prototype.find().

These are just a few of the many new features introduced in ECMAScript 2015.