Hooks are very flexible. However, there are certain limitations to using Hooks, which we should always keep in mind:

• Hooks can only be used in function components, not in class components
• The order of Hook definitions matters, and needs to stay the same; thus, we cannot put Hooks in if conditionals, loops, or nested functions

We are going to discuss these limitations in more detail, as well as how to work around them, throughout this book.