`outOfStock` variable always returning false even when the product is out of stock

[hatiprithwish]

The existing outOfStock variable will always return false even if the product is out of stock. Reason being, when any product page has "Currently unavailable." text, it is within two nested spans within the #availablity div.

To fix the problem, I'm using this code block and changed the named of the variable from outOfStock to isOutOfStock as it returns a Boolean.

const isOutOfStock =
      $(
        ".a-declarative span.a-size-medium.a-color-success" ||
          "#availablity span"
      )
        .text()
        .trim()
        .toLowerCase() === "currently unavailable.";