Everything you've rendered so far in this book has been straightforward declarative HTML. Life is never so simple: sometimes, your React components need to implement some imperative code under the covers.
This is the key – hiding the imperative operations so that the code that renders your component doesn't have to touch it. In this section, you'll implement a simple jQuery UI button React component so that you can see how the relevant life cycle methods help you to encapsulate the imperative code.
