There are even someJavaScript podcastsif you want to learn on the go. One of the ways to get started is to do practice exercises. But there are so many online that it can be hard to choose the right ones for a beginner. Core JavaScript can be extended for a variety of purposes by supplementing it with additional objects. Throughout most chapters, there are quizzes and exercises. These are a paid feature, but a comprehensive preview is available. The DOM or the Document Object Model of the page is created after the web page is loaded. It’s constructed as a tree of objects, and with it, JavaScript can access and change all the elements of an HTML document. Math in JavaScript is an inbuilt object with properties and methods that allow you to perform mathematical tasks on numbers. JS math practice exercises will enable you to learn to run numbers using math methods. An example is to use the correct Math method to get the square root of 9. If you need some help with your JavaScript practice projects, check out these top JavaScript and jQuery courses and tutorials. As you work through your JavaScript practices and your skills improve, you will start building more complex JavaScript projects.