strict mode

In frontend development, there are several terms that may be unfamiliar to you. This glossary provides explanations of these terms to help you better understand JavaScript and frontend development concepts. Let’s dive in! Terms Asynchronous Asynchronous code allows you to initiate a task, forget about it, and receive the result when it’s ready, without having to wait for it. An example is an AJAX call, where you can continue with other tasks while waiting for the response....

JavaScript Strict Mode is an important feature introduced in ES5 that allows JavaScript to behave in a more controlled and predictable manner. By enabling Strict Mode, you can change the semantics of the JavaScript language and prevent common mistakes that can lead to bugs or unexpected behavior. Enabling Strict Mode Strict Mode is optional and not enabled by default as it could potentially break existing JavaScript code. To enable Strict Mode, you need to include the 'use strict' directive at the beginning of your code....

The this keyword in JavaScript has different values based on its context. Ignoring this important detail can lead to confusion and bugs in your code. In this article, we will explore the different behaviors of this and how to use it effectively. The this Keyword in Strict Mode In strict mode, the this keyword outside of any object is always undefined. However, in the default sloppy mode, this refers to the global object (window in a browser context), unless specific cases override this behavior....

When should you use let over var? And why? Let’s find out! In modern JavaScript, there are three ways to declare a variable and assign it a value: const, let, and var. When it comes to working with variables in JavaScript, my default choice is always const. It guarantees that the value cannot be reassigned, making it a safer option. However, when there is a need to redeclare a variable later on, I always use let....