• kameecoding@lemmy.worldEnglish
    1·
    1 year ago

    yes, that is a solid logic, one that I also applied and expected to be the result.

    that is until a Vue component started complaining that I am passing in a number for a prop that expects a boolean.

    turns out the result of that code is actually: 0, because javascript

    of course if you flip it and try

    false && 0 && 1

    then you get false, because that’s what you really want in a language, where && behaves differently depending on what is on what side.

    • EuphoricPenguin@normalcity.lifeEnglish
      2·
      1 year ago

      I was incorrect; the first part of my answer was my initial guess, in which I thought a boolean was returned; this is not explicitly the case. I checked and found what you were saying in the second part of my answer.

      You could use strict equality operators in a conditional to verify types before the main condition, or use Typescript if that’s your thing. Types are cool and great and important for a lot of scenarios (used them both in Java and Python), but I rarely run into issues with the script-level stuff I make in JavaScript.