## E0137: missing condition for switch statement

A `switch` statement has a condition which determines which `case` or `default` label to execute. It is an error to omit a `switch`'s condition:

    function colorToHexCode(color) {
      switch {
        case 'red':   return '#ff0000';
        case 'green': return '#00ff00';
        case 'blue':  return '#0000ff';
      }
    }

To fix this error, write the condition with parentheses after the `switch` keyword:

    function colorToHexCode(color) {
      switch (color) {
        case 'red':   return '#ff0000';
        case 'green': return '#00ff00';
        case 'blue':  return '#0000ff';
      }
    }

Documentation for other errors