01.11 - Nullish Operator

TIL(Today I Learned)/2022년

01.11 - Nullish Operator

심리밀당남 2022. 1. 11. 13:07

1. Nullish Operator

The Nullish Coalescing Operator

function myFn(variable1, variable2) {
  let var2 = variable2 ?? "default value"
  return variable1 + var2
}

myFn("this has", " no default value") //returns "this has no default value"
myFn("this has no") //returns "this has no default value"
myFn("this has no", 0) //returns "this has no 0"

Logical Nullish Operator

function myFn(variable1, variable2) {
  variable2 ??= "default value"
  return variable1 + variable2
}

myFn("this has", " no default value") //returns "this has no default value"
myFn("this has no") //returns "this has no default value"
myFn("this has no", 0) //returns "this has no 0"