What causes jQuery to not work correctly during keydown events?

I've been working on this external jQuery code:

jQuery(document).one('keydown', 'g',function (evt){
    if ($("#tb").html() == "0")
    {
        $("#tb").html("Testing the chicken.")
    } else {$("#tb").html("Chickens fart too.")}
return false;});

No errors are showing in the console.

I know it might seem a bit silly, but I'm not concerned about the text inside .html(). Every time I visit the webpage, the default 0 gets replaced with nothing. Then, when I press any key, nothing seems to happen. Ultimately, my goal is for this script to display the letter or number that the user types in the tb div.

P.S. This is my first time using stackoverflow, so please let me know if my formatting is incorrect or if I've broken a rule.

So, I made some edits to the code and here's what I came up with:

$('#tb').on("keydown", function(event) {
    if ($("#tb").html() == "0")
    {
        $("#tb").html("Testing the chicken.")
    } else {$("#tb").html("Chickens fart too.")}
});

Despite the changes, it still doesn't seem to be functioning as expected.

javascriptjqueryhtmlcss

Answer №1

The div element does not support the keydown event. Only elements with the focus property can trigger this event.

It seems like you are referring to an input element within the div.

HTML

<div id="tb">
    <span class="output"></span>
    <input type="text" />
</div>

JS

// Delegating the keydown event on the input element to its container
$('#tb').on("keydown", 'input', function (event) {
    if ($(this).val() === "") {
        $(".output").html("Testing the chicken.");
    } else {
        $(".output").html("Chickens fart too.");
    }
});

Check out the Fiddle

// Binding the keydown event to the document when a key is pressed while the document is focused
$(document).on('keydown', function(event) {
    // Key code for g
    if(event.keyCode === 71) {
        $('#tb input').on('keyup', inputKeydown);
        $(document).off('keydown'); // unbind the event on document as it's no longer needed
    }
    return;
});

function inputKeydown() {
    if ($(this).val() === "") {
        $(".output").html("Testing the chicken.");
    } else {
        $(".output").html("Chickens fart too.");
    }
}

Another Fiddle Example

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