How to check undefined variable in a ternary operator?

Question

I have an issue with ternary operation:

let a = undefined ? \"Defined!\" : \"Definitely Undefined\",
    b = abc ? \"Defined!\" : \"Definitely Undefined\", // Re         


        

Answer 1

What is the best and short way to check if abc is undefined before accessing its properties as well as assign blank object {} if undefined?

And you said that

I am currently using (typeof abc !== "undefined")

Looks like you have abc defined and the value is undefined.

You can try doing

var a = abc || {};
console.log(a);