In this 19-video course, you will discover advanced React features such as lists and keys, including lists without keys, unique keys for lists, and correct key usage, and other topics. Learners begin with a look at the error that occurs when list elements are rendered without keys, then study the unique keys for list elements. Learn about the right usage of keys in components; how to render components using conditional evaluation; how to perform conditional rendering using variables; and how to evaluate conditions by using inline logical operators. Explore how to perform rendering with ternary operators; the use of local state in components; and the disadvantages of storing local state. Learn about removing state from lower-level components, and lifting state up to higher-level components. Delve into code reuse by using inheritance and code reuse by using composition. Examine how to use composition to customize child elements and how to create special components using composition. Explore the use of global properties without context, and finally, the use of context to specify global properties.