What will I learn in a JavaScript course? JavaScript courses cover variables, data types, functions, control flow, DOM manipulation, event handling, AJAX, and more. You will learn how to write JavaScript code, build interactive web pages, and work with popular JavaScript libraries and frameworks.What will I learn in a JavaScript course? JavaScript courses cover variables, data types, functions, control flow, DOM manipulation, event handling, AJAX, and more. You will learn how to write JavaScript code, build interactive web pages, and work with popular JavaScript libraries and frameworks.What will I learn in a JavaScript course? JavaScript courses cover variables, data types, functions, control flow, DOM manipulation, event handling, AJAX, and more. You will learn how to write JavaScript code, build interactive web pages, and work with popular JavaScript libraries and frameworks.