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In this article, we will learn about the difference between a method and a function in JavaScript. While both execute code blocks, the key difference is that a function is standalone code, while a method is a function that belongs to an object. What is a Function? A function is a reusable block of code that can be called anywhere in your program. Functions help create modular code by eliminating repetition. JavaScript functions can be defined using function expressions, arrow functions, or the function keyword. Syntax function functionName(parameter1, parameter2) { ... Read More
CDATA, the short form of Character Data, is a block of code that prevents parsing by the XML/HTML parser. Sometimes our data includes predefined characters like "" + cleanedContent + ""; Using replaceAll() Method (Tags Only) The replaceAll() method can remove only the CDATA tags () while preserving the content inside. This approach is useful when you want to keep the JavaScript code but remove the CDATA wrapper. Syntax string.replaceAll("", "") Example In this example, we remove only the CDATA tags while keeping the ... Read More
ECMAScript 6 (ES6), also known as ECMAScript 2015, introduced many powerful features to JavaScript. Most modern web browsers now support the majority of ES6 features, making them safe to use in production applications. Browser Compatibility Current ES6 browser support varies across different browsers: Browser ES6 Support Recommended Version Chrome 97%+ 51+ Firefox 97%+ 54+ Safari 95%+ 10+ Edge 96%+ 15+ Core ES6 Features You Can Use Today Arrow Functions Arrow functions provide a concise syntax for writing functions: // Traditional ... Read More
ECMAScript is a standardization specification, not an actual programming language implementation that you can download and run. Think of it as a blueprint that defines how JavaScript engines should work. What is ECMAScript? ECMAScript (standardized as ECMA-262) is a scripting language specification created to standardize JavaScript. It defines the syntax, types, statements, keywords, and built-in objects that JavaScript implementations should provide. ECMAScript vs JavaScript - Key Differences ECMAScript JavaScript Specification/Standard Implementation of the specification Defines language features Actual runnable code Published by ECMA International Implemented by browser engines ... Read More
In this article, we will learn about JavaScript's closures and anonymous functions. JavaScript is a powerful language that allows developers to write expressive and concise code. Two concepts that often confuse beginners are closures and anonymous functions. While they share some similarities, they serve different purposes and function differently in JavaScript. What are Anonymous Functions? An anonymous function is simply a function without a name. Anonymous, as the name suggests, allows the creation of a function without any name identifier. It can be used as an argument to other functions, assigned to a variable, or immediately invoked. They ... Read More
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 More
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 More
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 More
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 More
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 More