Operator Precedence Table This table ranks JavaScript operators by their precedence, with the higher-precedence operators (executed first) at the top. Operator Precedence Operator Description Associativity Example 1 () Grouping L -> R (expression) 2 . Member of object L -> …
In JavaScript, reserved keywords are terms that are set aside by the language for its internal use. These words cannot be used as identifiers (like variable names, function names, etc.). Using them as identifiers can result in errors or unexpected …
JavaScript syntax refers to the set of rules that defines how JavaScript code is written and structured. Understanding JavaScript syntax is crucial for writing correct and efficient programs. This tutorial will cover the most important aspects of JavaScript syntax, including …
Mixins in JavaScript are a flexible way to reuse code across multiple classes without using traditional inheritance. A mixin is an object or function that provides reusable methods, which can be mixed into other classes. Mixins help share behavior among …
Template literals (also called template strings) in JavaScript are a powerful feature introduced in ES6 (ECMAScript 2015). They allow you to create multi-line strings, embed variables and expressions into strings, and make string concatenation easier and more readable. In this …
In JavaScript, classes are a way to define blueprints for creating objects. While JavaScript has been an object-oriented language from the start, ES6 (ECMAScript 2015) introduced the class keyword, which simplifies working with object-oriented programming (OOP) concepts such as inheritance, …
Encapsulation is a key concept in object-oriented programming (OOP) that focuses on bundling the data (properties) and the methods (functions) that operate on that data into a single unit, usually a class or an object. Encapsulation helps in controlling access …
Inheritance is a core concept in object-oriented programming (OOP) that allows one class to inherit the properties and methods of another class. In JavaScript, inheritance enables code reuse and provides a way to create hierarchical class structures where subclasses (derived …
Abstraction is one of the key principles of object-oriented programming (OOP). It helps in hiding complex implementation details from the user and exposes only what is necessary for interacting with an object or system. In JavaScript, abstraction allows you to …
Polymorphism is a fundamental concept in object-oriented programming (OOP), which allows different objects to be treated in a similar way based on shared behaviors or interfaces. In JavaScript, polymorphism is often achieved through inheritance and method overriding, where objects of …
The if…else statement in JavaScript is one of the most fundamental control flow structures used to execute code based on conditions. It allows you to execute a block of code if a specified condition is true and, optionally, another block …
The typeof operator in JavaScript is used to determine the data type of a variable or expression. It returns a string that indicates the type of the operand, making it useful for debugging, validation, or writing code that handles different …
The grouping operator (()) in JavaScript is used to control the precedence of expressions. By using parentheses, you can group parts of an expression and force them to be evaluated in a specific order. This operator helps clarify your code …
The comma operator (,) in JavaScript is used to evaluate multiple expressions, and it returns the result of the last expression. While the comma operator may seem uncommon, it can be useful in certain scenarios where you want to execute …
The delete operator in JavaScript is used to remove properties from objects. It can be useful when you want to clean up or remove unwanted properties from an object, but it is not used for deleting variables or array elements …
The yield operator in JavaScript is used in conjunction with generators to control the flow of execution. Generators allow you to pause and resume function execution, which is very useful in cases like asynchronous programming, lazy evaluation, or iterating over …