javascript break out of loop

//break out of for loop
for (i = 0; i < 10; i++) {
    if (i === 3) { break; }
}By using 'return;':

function myfunction(){
   if(a == 'stop') 
      return;  //returns Void, ending function
}

Does not work when using a Conditional operator:

let result =  1 == 2   ?  "YES" : return;  //<--- throws error