Allowing if else blocks during assignment

💡 Ideas
1

Often times we want to assign different values based on condition but the ternary operator falls short as there nested cases and many more.

I think it will be very convenient to have if-else block for assignment
E.g

const value = if (condition) {
//...
return someValue;
} else {
//...
return someOtherValue;
}

The current workaround we have are:

  1. Declaring variable using let and then assigning it later
    E.g
let a;
if(condition) {
  a = someValue;
} else {
  a = someOtherValue;
}
  1. Creating functions or IIFE
let a = functionToGetValue();

// Or

let a = (function () {
  if(condition) {
    return someValue;
  } else {
    return someOtherValue;
  }
})();

Would love to know your thoughts on this

2

I believe you can currently achieve this with:

if(condition) {
    var a = someValue
}
else {
    var a = someOtherValue
}
console.log(a)

It works because of var's lexical scoping.

3

See https://github.com/tc39/proposal-do-expressions

2 Likes
4

Yep, this surely works but I think we're past a point where it is safe to say var should be avoided.
Also my idea let's us create variables using const

5

Thank you very much, this looks promising, will check this out more in detail