how to write if within jsx code example

Example 1: jsx if block

render () {
  return (
    

      {(() => {
        if (someCase) {
          return (
            
someCase
          )
        } else if (otherCase) {
          return (
            
otherCase
          )
        } else {
          return (
            
catch all
          )
        }
      })()}
    
  )
}

Example 2: make a if in jsx

var loginButton;
if (loggedIn) {
  loginButton = ;
} else {
  loginButton = ;
}

return (
  
);