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Showing posts with the label Beginner's Guide

Mastering the Basics of JavaScript: A Quick and Comprehensive Guide

JAVASCRIPT Javascript is a client-side programming language. It basically uses for changing the behavior of simple HTML at occurring an event by clicking, cursor hovering, and key pressing. Javascript writes in '.html' file, and '.php' file internally and externally with the extension of '.js'. In HTML, You can write javascript code anywhere but head tags (<head> javascript code </head>) are recommended. Note: * JQuery is a Javascript library that has pre-built functions of javascript. AJAX is a Javascript Framework that allowed changes in the data and behavior of a page without reloading. SYNTAX: '<script type="text/javascript">' (Open tag) and '</script>' (Close tag) DATATYPE: number (2, 2.5, 2.56e45) string ('java', "script", '5') boolean (true, false) object (all types of arrays) OPERATORS: Arithmetic Operators (+, -, *, /, %, **) Increment/Decrem...

Demystifying JavaScript Hoisting: Unveiling How Variables and Functions Rise to the Top

In the world of JavaScript, there's a phenomenon known as "hoisting" that can catch even seasoned developers by surprise. Imagine a scenario where variables and functions seem to jump to the top of their containing scope, defying the usual order of execution. In this article, we'll dive deep into the concept of hoisting, demystifying its mechanics, and providing crystal-clear code examples. What is Hoisting? Hoisting is a behavior in JavaScript where variable and function declarations are moved to the top of their containing scope during the compilation phase. This means that you can use a variable or call a function before it's declared in your code. Hoisting with Variables: console.log(myVar); // undefined var myVar = 10; console.log(myVar); // 10 In this example, even though myVar is logged before its declaration, JavaScript doesn't throw an error. The variable declaration is effectively moved to the top, but its assignment stays in place....