Javascript Toggle On Keydown

I'm pretty new when it comes to getting my head around JS functions. Everything I've used before, I've tended to use as-is, but I've been trying to combine and modify a function to

Solution 1:

You want to show and hide an element, why set its height and visibility? Just show/hide it with toggle.

$(document).keydown(function (e) {
    if (e.keyCode == 76 && e.ctrlKey) {
         $("#thediv").toggle();
    }
});

Looking at your code

$(document).keydown(function (e) {
    if (e.keyCode == 76 && e.ctrlKey) {

        //This funciton is never called, you define it, do not call it!functiontoggler('thediv') { //<-- Error Here, you have a string as an argument?var myDiv = document.getElementById('thediv').style.height;
            if (myDiv == "auto") {
                document.getElementById('thediv').style.height = "0px";  //<--Bad practice using document.getElementById('thediv') over and over. Store it into a variable and reference it.document.getElementById('thediv').style.opacity = "0";

            } else {
                document.getElementById('thediv').style.height = "auto";
                document.getElementById('thediv').style.height = "1";
            }
        }

    }
});