What are inline conditional expressions

When you want to set the condition in the jsx. You can simply use js if else statements apart from these approaches, you can also embed any expressions in JSX by wrapping them in curly braces and then followed by JS logical operator &&.

<h1>Hello!</h1>
{
    messages.length > 0 && !isLogin?
      <h2>
          You have {messages.length} unread messages.
      </h2>
      :
      <h2>
          You don't have unread messages.
      </h2>
}