What could be the reason for my new course not being recognized?

Looking to modify the behavior of a button where, when clicked, it hides a specific div element, changes its text display, and toggles between classes using addClass/removeClass for subsequent click events.

Unfortunately, the intended functionality is not working as expected, and I'm unsure why.

Here's a snippet of the code:

HTML:

<!DOCTYPE html>
<html>
    <head>
        <title>Magic Disappearance</title>
        <link rel='stylesheet' type='text/css' href='stylesheet.css'/>
        <script type='text/javascript' src='script.js'></script>
    </head>
    <body>
        <div class="vanish1"></div>
        <div class="vanish2"></div>
        <div class="vanish3"></div>
        <div class="vanish4"></div>
        <br/>
        <br />
        <button class='first' value='button'>Make it disappear!</button>
    </body>
</html>

CSS:

.vanish1 {
    height: 100px;
    width: 100px;
    display: inline-block;
    background-color: #F38630;
    border-radius: 5px;
}

.hide1 {
    color: red;
}

Javascript (jQuery):

$(document).ready(function() {
    $('.first').click(function() {
            $('.vanish1').fadeOut('slow');
            $(this).text('Bring it back!');
            $(this).addClass("hide1");
            $(this).removeClass("first");
    });

    $('.hide1').click(function() {
        $('.vanish1').fadeIn('slow');
        $(this).text('Make it disappear!');
        $(this).removeClass("hide1");
        $(this).addClass("first");
    });
});

Upon clicking the button, the designated div disappears successfully with the class change reflected in the CSS and browser dev tools. However, the reversal process on subsequent clicks does not occur as expected.

Any assistance on this issue would be greatly appreciated!

Answer №1

One approach to handling dynamic HTML changes is by using a delegate. Take a look at this delegate documentation for more information and see an example in action on this Fiddle.

$('body').on('click', '.first', function() {
        $('.vanish1').fadeOut('slow');
        $(this).text('Show the box!');
        $(this).addClass("hide1");
        $(this).removeClass("first");
});
$('body').on('click', '.hide1', function() {
    $('.vanish1').fadeIn('slow');
    $(this).text('Hide the box!');
    $(this).removeClass("hide1");
    $(this).addClass("first");
});

Answer №2

When you dynamically add/remove classes, like adding the class hide1 when .first is clicked, the .hide1 class may not be registered prior to the click event. One solution is to bind the event to the body using jQuery's on method.

Answer №3

When defining your handlers, the .hide1 button is not yet created and therefore the event binding does not occur. There are a couple of ways to work around this issue:

1: Implement an actual toggle:

(function() {
    var toggle = true;
    $(document).ready(function() {
        $(".first").click(function() {
            toggle = !toggle;
            if( toggle) {
                $(".vanish1").fadeIn("slow");
                $(this).text("Hide the box!").removeClass("hide1").addClass("first");
            }
            else {
                $(".vanish1").fadeOut("slow");
                $(this).text("Show the box!").addClass("hide1").removeClass("first");
            }
        });
    });
})();

or 2: utilize the on method:

$(document).ready(function() {
    $('.first').on('click',function() {
            $('.vanish1').fadeOut('slow');
            $(this).text('Show the box!').addClass("hide1").removeClass("first");
    });

    $('.hide1').on('click',function() {
        $('.vanish1').fadeIn('slow');
        $(this).text('Hide the box!').removeClass("hide1").addClass("first");
    });
});

The first method is recommended.

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