Codecademy NumberGuesser JS question

Hi, I have been working through Codecademy's JavaScript lately. I just finished working on (and editing parts of) the Number Guesser Project. I have several questions about the Script.js file which I while link a GitHub repo to so you guys can reference:

A) Firstly, for the parameter “target” used in the functions CompGuess and HumanGuess, how are we calling that value to subtract from compNum and humanNum if “target” hasn’t been defined? I know that question sounds confusing but in essence, I don’t understand how we get “target” from the generateTarget function.

B) My second question is pretty similar to the first. How does the script go from finding whether HumanGuess <= CompGuess is true or not to using that to decide if winner===‘human’ or inner===‘computer’?

I’m sure these are pretty simple concepts, but I basically just do not understand how some of the values get transferred without necessarily being written explicitly. Sometimes, things just seem to transfer over without any reason behind them - it just looks too convenient sometimes. Thank you to anyone who sees and responds to this, I really appreciate it!

A: Here is the function I think you referred to in script.js:

function compareGuesses(humanNum,computerNum,target)
    let CompGuess=Math.abs(target-computerNum);
    let HumanGuess=Math.abs(target-humanNum);

    if (humanNum>9 || humanNum<0)
        alert('Please enter a number between 0 and 9.');
    if (HumanGuess<=CompGuess)
        return true;
        return false;

target is the 3rd parameter to the function so it will be defined as long as the function is called with 3 or more parameters. The 3 parameters are called humanNum, computerNum and target. It’s a bit confusing that the game.js also has a target variable but that is not what is used inside the above function due to scope rules. They just have the same name.

B: Before doing this comparison the function does this:

    let CompGuess=Math.abs(target-computerNum);
    let HumanGuess=Math.abs(target-humanNum);

So CompGuess will be the difference between target and computerNum (there is a subtraction). And we take the absolute of that difference to get a positive number (if it was negative). Those variables are named a little oddly and perhaps could have been named compTargetDiff or something like that since they represent how far from target the guess is.