jashkenas--coffeescript/documentation/sections/switch.md

Switch/When/Else

switch statements in JavaScript are a bit awkward. You need to remember to break at the end of every case statement to avoid accidentally falling through to the default case. CoffeeScript prevents accidental fall-through, and can convert the switch into a returnable, assignable expression. The format is: switch condition, when clauses, else the default case.

As in Ruby, switch statements in CoffeeScript can take multiple values for each when clause. If any of the values match, the clause runs.

codeFor('switch')

switch statements can also be used without a control expression, turning them in to a cleaner alternative to if/else chains.

codeFor('switch_with_no_expression')