Author: Saim Khalid

The Temporal Dead Zone (TDZ) is a JavaScript concept which explains how variables behave when let and const are used. It means that before a variable can be used it needs to be defined. This takes place in between the declaration of the variable and the start of the block like a function or loop.…

The Array.sort() method in JavaScript is an essential tool for any developer that works with data sets. While sorting a list of numbers or words is simple, sorting arrays of objects based on numerous criteria becomes more complicated. In this chapter, we will look at various ways for making full use of Array.sort() for creating…

This chapter will show the CRUD operations on a JavaScript object. The operations are Create, Read, Update, and Delete. We can create, modify, take input, and delete objects with these actions. A JavaScript object consists of a collection of keys, values, or properties/attributes, and entries. Values can be any type of data, including arrays, JavaScript…

Session Storage in JavaScript The JavaScript sessionStorage object is a window object property that appears in all current browsers. The page’s protocol, host-name and port are linked to any sessionStorage data. Each window contains its own session storage. The JavaScript sessionStorage method contributes to the reliable storage of user data. In JavaScript, we use the…

JavaScript Selection API allows us to access and change or modify the portion of a web page which is selected by the user.This includes selecting which text or elements to highlight and providing options for connecting with the selected item. But it should be noticed that the Selection API is not available in Web Workers…

Files with JavaScript code that performs a specific task are called modules. It is easy to add, remove, and update functionalities without affecting your entire code because modules are self-contained and separated from other parts of code. If these modules are in separate JavaScript files you should use them inside the original JavaScript code. In…

In web development responsiveness refers to how a system responds to changes in data. This concept is important for creating modern, dynamic web applications in which user actions need speedy responses like updating a page without reloading it or dynamically changing what the user sees when data is updated. This chapter covers some powerful JavaScript…

Prototypal Inheritance The classical inheritance phenomenon involves making a new class that actually extends or reuses the attributes, functions, or methods of another class that are used by different programming languages (like C, C++, Java, and so on). JavaScript uses Prototype Inheritance rather than classical inheritance. Prototype Inheritance happens when one object uses the prototype…

The Lisp programming language family is built around S-expressions. In this article, you will learn about the steps of making a simple S-expression parser. This can form the basis for the Lisp parser. Lisp is the easiest language to implement and creating a parser is the first step. We can use a parser generator for…

In JavaScript, a package manager is a tool that makes simple to install, manage, and update libraries, or packages, in your project. You can save time and add functionality without having to start from scratch by using these packages, which are reusable code pieces provided by other developers. Need of a Package Manager Suppose there…