J.S switch - help: Can you do DOM with switch,

Question

Can we do DOM, with switch,

Let's say we have

<div id = "elm1"> 111111 </div>
<div id = "elm2> 22222 </div>

Start code with this:
var a;
var b;
switch (new Date().get Day()){
case 0:
....
}
When It's Sunday (case 0):
elm1 needs to display block, elm2 need to display none;
When It's Monday (case 1):
elm1 needs to display none, elm2 needs to display block;

(If you can, please start with the starer code I gave you at top:
var (1st var);
var (2nd var);
switch(new Date().get Day()){
case 0:

}

Answer 1

The above approach seems quite well. Where's the problem?

Answer 2

M. Watney , I put it on words, but i couldn't turn my words into code.

my real questipn should be ' how to have miltiple expressions in one case?'
but now i figured it out: using comma.

case 0:
var a: doc...ById("elm1").style.dusplay="block") , doc...ById("elm2").style.display="none";
break;
case 1:
//Same thing for 1, but opposite of 0 (flip none and block).

Yeah, anyways i figured it out,

Thanks btw.✔️