switch-behavior.js

// If there is no break then the execution
// continues with the next case without any checks
// This might be an interesting way to stagger actions
//
// Clever, but maybe would be too unreadable
let a = 2 + 2;

switch (a) {
  case 3:
    console.log( 'Too small' );
  case 4:
    console.log( 'Exactly!' );
  case 5:
    console.log( 'Too big' );
  default:
    console.log( "I don't know such values" );
}

// another example that groups cases
let b = 3;

switch (b) {
  case 4:
    console.log('Right!');
    break;

  case 3: // (*) grouped two cases
  case 5:
    console.log('Wrong!');
    console.log("Why don't you take a math class?");
    break;

  default:
    console.log('The result is strange. Really.');
}