Use functions + dictionary instead of Switch/Case (illustrative purposes)

Switch Case is Not the JS Way

// Setup
function onGet(){ /* .. */ }
function onDelete(){ /* .. */ }
function onPost(){ /* .. */ }
var onPut = onPost; // Sharing functionality.

// Bad
function processRequest(method){
  var requestMethod = method.toLowerCase();

  switch(requestMethod){
    case "get":
      onGet();
      break;
    case "delete":
      onDelete();
      break;
    // Can be dangerous, also not good for readability
    case "post":
    case "put":
      onPost();
      break;
  }
}

// Good
// Extra Setup
var methodHandlers = {
  "get": onGet,
  "delete": onDelete,
  "post": onPost,
  "put": onPut
};

function processRequest(method){
  var requestMethod = method.toLowerCase();

  // Get  reference to the method so we don't do a lookup twice
  var handler = methodHandlers[requestMethod];

  // If we have a handle, run it.
  if(typeof handler === 'function') handler();
}

Doesn't perform as well, by just a bit, but is much more JavaScripty: http://jsperf.com/case-against-switch-case