Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Javascript Articles
Page 523 of 534
When is a CDATA section necessary within a script tag?
When working with JavaScript inside HTML documents, developers may come across the CDATA section. It can be helpful when dealing with older XHTML documents or embedded JavaScript in XML-based markup. What is a CDATA Section? A CDATA (Character Data) section is a special syntax used in XML and XHTML documents to prevent certain characters from being interpreted as markup. It ensures that special characters like Why Was CDATA Used in Tags? In XHTML documents, the XML parser would interpret JavaScript operators like , and & as markup, causing parsing errors. CDATA sections prevented this ...
Read MoreWhat is the !! (not not) operator in JavaScript?
In this article, we will learn about the !! (not not) operator in JavaScript. This double negation forces a value to be evaluated as either true or false. What is the !! Operator? The double negation (!! ) operator is the ! operator twice and calculates the truth value of a value. It returns a Boolean value, which depends on the truthiness of the expression. How It Works The first ! negates the value, converting it to true or false. The second ! negates it again, effectively converting it ...
Read MoreWhat is the difference between Bower and npm in JavaScript?
npm and Bower are JavaScript package managers that handle dependencies differently. Understanding their differences helps choose the right tool for your project. npm (Node Package Manager) npm is primarily designed for Node.js modules and uses a nested dependency tree. It works for both server-side and front-end development, supporting tools like Grunt, Webpack, and CoffeeScript. npm allows multiple versions of the same package to coexist, preventing dependency conflicts through nested installation. Dependency Structure project root [node_modules] -> dependency P -> dependency Q [node_modules] -> dependency P (different version) ...
Read MoreHow to include JavaScript in HTML Documents?
In this tutorial, we will learn how to include JavaScript in HTML Documents. To include JavaScript in HTML Documents, use the tag. JavaScript can be implemented using JavaScript statements that are placed within the ... . You can place the tags, containing your JavaScript, anywhere within your web page, but it is normally recommended that you should keep it within the tags. We will discuss the following three approaches to include JavaScript in HTML documents − Embedding code (within head or body) Inline Code (inside any ...
Read MoreWhat is the relationship between JavaScript, CoffeeScript, TypeScript, ES5, and ES6?
JavaScript serves as the foundation for web development, with several related languages and versions that enhance or extend its capabilities. Understanding their relationships helps developers choose the right tools for their projects. JavaScript (The Foundation) JavaScript is the core programming language that runs in browsers and Node.js environments. All other languages mentioned either extend JavaScript or compile to it. // Basic JavaScript function greet(name) { return "Hello, " + name + "!"; } console.log(greet("World")); Hello, World! ES5 vs ES6 (JavaScript Versions) ES5 (ECMAScript 5) and ...
Read MoreWhat is the difference between JavaScript, JScript & ECMAScript?
JavaScript, JScript, and ECMAScript are closely related but serve different purposes in web development. Understanding their relationships helps clarify the JavaScript ecosystem. What is ECMAScript? ECMAScript is the official standard specification that defines the syntax, types, statements, keywords, and objects that scripting languages should implement. ECMA stands for European Computer Manufacturer's Association (now called Ecma International). ECMAScript serves as the blueprint that various implementations follow: // ECMAScript defines standard features like: let variable = "Hello World"; const PI = 3.14159; function greet(name) { return `Hello, ${name}!`; } What is ...
Read MoreHow do I get the current date in JavaScript?
To get the current date in JavaScript, you can use the Date object along with various methods to extract different parts of the date. Getting the Current Date Object The new Date() constructor creates a Date object representing the current date and time: var currentDate = new Date(); console.log(currentDate); 2024-01-15T10:30:45.123Z Getting the Day of the Month The getDate() method returns the day of the month (1-31): var date = new Date(); var dayOfMonth = date.getDate(); console.log("Day of month: " + dayOfMonth); Day of month: 15 ...
Read MoreWhere is JavaScript Today?
JavaScript has evolved significantly since its creation in 1995. Today, it stands as one of the most popular and versatile programming languages in the world, powering everything from simple web interactions to complex server applications and mobile apps. Current JavaScript Standard The latest JavaScript standard is ECMAScript 2023 (ES14), released in June 2023. However, ECMAScript 2017 (ES8) remains widely supported and includes major features like async/await, Object.entries(), and string padding methods. The ECMA-262 Specification continues to define the core JavaScript language standards. JavaScript's Modern Role JavaScript is no longer limited to browser-based interactions. It has expanded ...
Read MoreHow to check whether a string contains a substring in JavaScript?
JavaScript provides us with different methods to check whether a string contains a substring or not. In this article, we use the following three methods for this purpose: String search() method String indexOf() method String includes() method Let's explore in detail each method. Using String search() Method The string search() method can be used to search a text (using regular expression) in a string. It matches the string against a regular expression and returns the index (position) of the first match. It returns -1 if no match is found. It's case-sensitive. The ...
Read MoreWhat are some JavaScript Development Tools?
One of the major strengths of JavaScript is that it does not require any expensive development tools. You can start with a simple text editor such as Notepad. Since it is an interpreted language inside the context of a web browser, you don't even need to buy a compiler. To make our lives simpler, various vendors have come up with very nice JavaScript editing tools. Some of them are listed here − Code Editors and IDEs A quality code editor is the backbone of any JavaScript development process. Visual Studio Code ...
Read More