how does switch case work in javacript code example

Example 1: Javascript switch case code format

switch(type) {
	case "SomeString":
		// Functionality
		break;
	case "OtherString":
		// Functionality
		break;
	default:
		// Functionality
		break;
}

Example 2: switch case in js

var coll1="kjc;

switch(coll1)
{
  case "kjc":
    alert("youre special");
    break;
  case "horizon":
    alert("worst behaviour");
    break;
  case "cmr" :
    alert("worst character");
    break;
  default:
    alert("kjc is best");
    break;
}