1switch(expression) {
2  case x:
3    // code block
4    break;
5  case y:
6    // code block
7    break;
8  default:
9    // code block
10}

1//javascript multiple case switch statement
2var color = "yellow";
3var darkOrLight="";
4switch(color) {
5    case "yellow":case "pink":case "orange":
6        darkOrLight = "Light";
7        break;
8    case "blue":case "purple":case "brown":
9        darkOrLight = "Dark";
10        break;
11    default:
12        darkOrLight = "Unknown";
13}
14
15//darkOrLight="Light"

1let color = "black";
2
3switch(color){
4    case "red":
5        console.log("color is red");
6        break;
7    case "white":
8        console.log("color is white");
9        break;
10    case "black":
11        console.log("color is black");
12        break;
13    default:
14        console.log("unknow color");
15}

1var day = new Date();
2switch(day.getDay()) 
3   {
4    case 0:
5        console.log("Today is Sunday");
6        break;
7    case 1:
8        console.log("Today is Monday");
9        break;
10 
11    case 2:
12        console.log("Today is Tuesday");
13        break;
14 
15    case 3:
16        console.log("Today is Wednesday");
17        break;
18 
19    case 4:
20        console.log("Today is Thursday");
21        break;
22 
23    case 5:
24        console.log("Today is Friday");
25        break;
26 
27    case 6:
28        console.log("Today is Saturday");
29        break;
30 
31    default:
32        console.log("No Information Found");
33        break;
34 }
35 
36// Output : Today is Monday
37

1var a=3;
2switch(a)
3{
4    case 1:
5        console.log("Value of a is 1");
6        break;
7 
8    case 2: // grouped three cases
9    case 3:
10    case 4:
11        console.log("Value of between 2 and 4");
12        break;
13 
14    default:
15        console.log("Value of a not matched");
16        break;
17}
18 
19// Output: Value of between 2 and 4
20

1switch(x){
2    case value1: // if x === value1 
3     ...      
4        break;
5    case value2: // if x === value2
6        ...
7        break;   
8    default: // if x not match 
9        ...
10}
11