JavaScript

What Are JavaScript Errors? JavaScript errors are issues that prevent the code from executing as expected. These errors can be: Types of JavaScript Errors 1) Syntax ErrorSyntax errors occur when the code violates JavaScript’s syntax rules. These errors prevent the script from running. Example: console.log(“Hello World) // Missing closing quote// Uncaught SyntaxError: Unexpected string Solution:Always … Read more

In JavaScript, operator precedence determines the order in which operators are evaluated in an expression. When multiple operators appear in a single expression, the JavaScript engine uses precedence rules to decide which operator to execute first. What is Operator Precedence? Operator precedence defines the priority of operators in expressions. Operators with higher precedence are executed … Read more

What Are Regular Expressions? Regular expressions are patterns used to match character combinations in strings. In JavaScript, they are implemented using the RegExp object or regular expression literals. Syntax Regular Expression Literal: const regex = /pattern/flags; Using the RegExp Constructor: const regex = new RegExp(‘pattern’, ‘flags’); Flags in Regular Expressions Flags are optional modifiers that … Read more

What Are Bitwise Operators? Bitwise operators work on the binary representation of numbers. While JavaScript numbers are stored as 64-bit floating-point values, bitwise operations treat them as 32-bit signed integers. Example: Binary Representation The decimal number 5 is represented in binary as 00000000 00000000 00000000 00000101. Bitwise operators directly manipulate these bits to produce a … Read more

What is JavaScript Destructuring? JavaScript destructuring is a powerful syntax that allows you to unpack values from arrays or properties from objects into distinct variables. This feature, introduced in ES6, simplifies your code by replacing repetitive assignments with concise and readable structures. Benefits of Destructuring Destructuring Arrays Basic Array Destructuring Array destructuring extracts values from … Read more

What is JavaScript Type Conversion? In JavaScript, type conversion is the process of changing a value from one data type to another. This is a common task when handling data dynamically, especially when input types don’t match the expected format. JavaScript supports two types of type conversions: implicit conversion (type coercion) and explicit conversion (type … Read more

What is the typeof Operator? The typeof operator in JavaScript returns a string that indicates the type of a given variable or expression. It is particularly useful for understanding the kind of data stored in a variable. Syntax: typeof operand// ORtypeof(operand) Examples of typeof Here are examples of how the typeof operator works with various … Read more

What is JavaScript Map Methods? JavaScript Map methods are essential for managing key-value pairs in a Map object. They allow developers to add, retrieve, modify or delete entries efficiently. With their flexibility and simplicity, these methods provide a structured approach to handling data collections in JavaScript. Overview of JavaScript Map Methods Here is a list … Read more

What is a JavaScript Map? A Map is a collection of elements where each element is stored as a key-value pair. Keys and values can be of any data type. Key Features of Maps: Creating a Map: const map = new Map(); Common Methods and Properties of Maps 1. set(key, value) Method The set() method … Read more

What is JavaScript Set Methods? JavaScript Sets are collections of unique values and they come equipped with several built-in methods to perform common operations. These methods make it easy to add, remove and check elements, among other tasks. List of JavaScript Set Methods 1. add() Method The add() method adds a new element to the … Read more