Before learning JavaScript, it can be helpful to have a basic understanding of the following concepts: - HTML and CSS: JavaScript is often used in conjunction with HTML and CSS to create dynamic and interactive web pages. - Programming concepts: JavaScript is a programming language, so having a basic understanding of programming concepts such as variables, data types, functions, control structures, and object-oriented programming will help you learn JavaScript more easily. - Basic math concepts: JavaScript is often used to perform calculations and manipulate numbers, so having a basic understanding of math concepts such as arithmetic, algebra, and geometry can be helpful. - Algorithms and data structures: JavaScript is often used to implement algorithms and data structures, so having a basic understanding of these concepts will be helpful when you start writing more complex programs. While these concepts can be helpful to know before learning JavaScript, they are not necessarily required. You can still learn JavaScript without prior knowledge of these concepts, but it may take a bit more time and effort to fully understand how JavaScript works and how it can be used to create web applications.