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 class vs className This lesson will cover more advanced JSX. You’ll learn some powerful tricks and some common errors to avoid. Grammar in JSX is mostly the same as in HTML, but there are subtle differences to watch out for. The most frequent of these involves the word class. In HTML, it’s common to use class as an attribute name: <h1 class = "big" > Title </h1> In JSX, you can’t use the word  class ! You have to use  className  instead: <h1 className = "big" > Title </h1> This is because JSX gets translated into JavaScript, and  class  is a reserved word in JavaScript. When JSX is  rendered , JSX  className  attributes are automatically rendered as  class  attributes. Self-Closing Tags Another common JSX error involves  self-closing tags . What’s a self-closing tag? Most HTML elements use two tags: an  opening tag  ( <div> ), and a  closing tag  ( </div> ). However, some HTML elements such as  <img>  and  <input>  u