01.11 - Nullish Operator

 

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"