I just try to make a switch by two values.
switch ({'a': val_a,'b': val_b}){
case ({'x','y'}):
"some code here"
break;
}
and this not working... any help? thanks!
Switch operator only works for primitives, it's not possible to compare objects, but you can create primitive by yourself, e.g string
const compareValue = val_a + ' ' + val_b;
switch (compareValue){
case 'x y':
//"some code here"
break;
}
The value in a case statement must be a constant or a literal or an expression that evaluates to a constant or a literal. You can't expect a switch statement to have objects and underyling case statements have their own objects and do a comparison.
Having said that you've options in javascript that allow you to transform an object (just for comparison purpose). An approach I would following would be like this
let obj = {'a': 'x','b': 'y'};
let obj1={a:'x',b:'y'};
switch(Object.values(obj).join(','))
{
case Object.values(obj1).join(','):
console.log('evaluation succeeds');
break;
}
So what I've done is took the object values and joined with a comma(effectively having a string), and in the case statement did same with another object (so that comparison could take place)
switch(true) {
case obj1.a == obj2.a && obj1.b == obj2.b:
console.log('true');
break;
}