I am trying to update a lib I got from GitHub and there is a strange condition I have never seen before, can someone help me understand what is this? As I understand _c = _b === null means that _c get's a value of true or false... and later on _c !== undefined will always be true.. am I missing something?

  const _b = { isWrappable: true, insertedTag: false };
  let _c;
  const status = (_c = _b === null || _b === undefined ? undefined : _b.isWrappable) !== null && _c !== undefined ? _c : false;
  console.log(status);

after this line status is true

Now, how can I change this line to avoid Unexpected assignment within ConditionalExpression. because everything I tried gives me false, for example:

  const _b = { isWrappable: true, insertedTag: false };
  const _c = _b === null;
  const test = (_c || _b === undefined ? undefined : _b.isWrappable) !== null && _c !== undefined ? _c : false;
  console.log(test);

• _b is a variable, it can be null or undefined sometimes

Thanks