ECMAScript 6 (ES6) New Features
|
Name |
Description |
| let keyword |
It is used to declare variables in JavaScript that are block-scoped. |
| const keyword |
It is used to declare variables with immutable values. |
| Arrow Functions |
It defines anonymous functions in JavaScript. |
| The … Operator |
Spread/rest operator unpacks elements (spread) or gathers (rest) them conveniently. |
| For/of |
Iterates over values in iterable objects like arrays, and strings. |
| Map Objects |
It stores key-value pairs, allowing any key type. |
| Set Objects |
It stores unique values, preventing duplicates. |
| Classes |
It is used to define blueprints for creating objects. |
| Promises |
Manage asynchronous operations, simplifying callbacks and async handling. |
| Symbol |
It is unique, immutable, used for private property keys. |
| Default Parameters |
Sign values when function arguments are not provided explicitly. |
| Function Rest Parameter |
Collects function arguments as an array for flexible parameter handling. |
| String.includes() |
Checks if substring is present, returning true/false result. |
| String.startsWith() |
Checks if string begins with specified substring, returning boolean. |
| String.endsWith() |
Checks if string ends with provided substring, returning boolean. |
| Array.from() |
Converts array-like/iterable objects to new array with optional mapping. |
| Array keys() |
Iterates over array indices, allowing index-based iteration. |
| Array find() |
Locates and returns the first array element satisfying a provided condition. |
| Array findIndex() |
Retrieves the index of the first array element satisfying a given condition. |
| New Math Methods |
Methods to perform some mathematical functions. |
| New Number Properties |
Methods to perform some numeric functions, that contains the date, integers, and floating points, etc |
| New Number Methods |
Number.isInteger() and Number.isSafeInteger() |
| New Global Methods |
isFinite() and isNaN() |
| Object entries |
Converts object properties to an array of [key, value] pairs |
| JavaScript Modules |
Encapsulate code for better organization and reusability. |
JS 2015 or ECMAScript 6 (ES6)
JS 2015 (ES6) also known as ECMAScript 6 (ES6), ECMAScript 6 (ES6) is a significant update to JavaScript, introducing arrow functions, classes, template literals, let and const for variable declaration, enhanced object literals, destructuring, and more modern features for better code organization and readability.
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