# E0427: missing 'break;' or '// fallthrough' comment between statement and 'case'

Switch Cases in javascript fallthrough to the next case if the `break` statement is not added at the end of the case. Since there is no explicit way of communication whether the fallthrough is intentional or not, it is recommended to use a comment indicating fallthrough.

    function test (c) {
      switch (c) {
        case 1:
          console.log('case 1');
        default:
          console.log('default');
      }
    }

To fix this error, place a comment at the end of `case 1` indicating fallthrough

    function test (c) {
      switch (c) {
        case 1:
          console.log('case 1');
          //fallthrough
        default:
          console.log('default');
      }
    }

Documentation for other errors