Once a function is defined it can be called (invoked) from anywhere in the document, by typing its name followed by a set of parentheses, likesayHello() in the example above.. ⭐ Note: A function name ...

Learn how to create a callback function in JavaScript and use it for various purposes, such as asynchronous programming, modularity, flexibility, and custom events.

This lab describes some more advanced concepts related to JavaScript functions. Be sure to take time to experiment or read up on a concept if you're not comfortable with the idea before moving on. If ...

JavaScript (JS) is a high-level scripting language complies with the ECMAScript Specification. JavaScript is one of the most important technologies involved in the creation of the internet. It enables ...

Classes in ecma 2015 is special function so like functions classes can be defined by class declaration and class expression but both have some differences as well. so, today in this tutorial i will ...

In JavaScript, though, the same code is perfectly fine: This is because JavaScript scopes your variables to functions and not to if-blocks. But, we can achieve block-like scope through the use of ...