jquery persistently selects element even after altering the class

Question

jquery persistently selects element even after altering the class

Having an issue with a button that needs to change its function after meeting a certain condition.

I am attempting to select the button by its class, remove that class when the condition is met, add a new class, and then perform another action. However, it is not working as expected.

Here is an example of my problem:

$('.button-1').click(function(){
    $('.box').width(function(){
        return $(this).width() + 10;
    });
    $(this).removeClass('button-1').addClass('button-2');
});
$('.button-2').click(function(){
    $('.box').width(function(){
        return $(this).width() - 10;
    });
    $(this).removeClass('button-2').addClass('button-1');
});

You can view the code on this Fiddle link.

My expectation was for the black box width to toggle between increasing and decreasing, but it continues to increase only.

javascript jquery html css

Answer 1

Answer №1

To address this issue, you need to implement event delegation for dynamic binding. Here's an example of how to do it:

$(document).on('click','.button-1', function(){
    $('.box').width(function(){
        return $(this).width() + 10;
    });
    $(this).removeClass('button-1').addClass('button-2');
});
$(document).on('click','.button-2', function(){
    $('.box').width(function(){
        return $(this).width() - 10;
    });
    $(this).removeClass('button-2').addClass('button-1');
});

Check out the demonstration here.

Answer 2

To address this issue, you need to implement event delegation for dynamic binding. Here's an example of how to do it:

$(document).on('click','.button-1', function(){
    $('.box').width(function(){
        return $(this).width() + 10;
    });
    $(this).removeClass('button-1').addClass('button-2');
});
$(document).on('click','.button-2', function(){
    $('.box').width(function(){
        return $(this).width() - 10;
    });
    $(this).removeClass('button-2').addClass('button-1');
});

Check out the demonstration here.

Answer 3

Answer №2

Sure, that's one way to approach it...but have you considered using an additional variable to track if a click has occurred? This approach simplifies the code and allows for easy checking later on to see if the box has been enlarged.

By utilizing this method, you're also separating style from logic, which is generally seen as a best practice.

var clicked = false;
$('body').on('click', '.button', function(){

if (clicked) {
    $('.box').addClass('enlarged');
    clicked = false;
} else {
    $('.box').removeClass('enlarged');
    clicked = true;
}

});

Additionally, make sure to include a CSS class like the following:

.enlarged {
    width: 110px; 
}

I've also removed the button-1 and button-2 classes and instead applied the 'button' class directly to the div.

Answer 4

Sure, that's one way to approach it...but have you considered using an additional variable to track if a click has occurred? This approach simplifies the code and allows for easy checking later on to see if the box has been enlarged.

By utilizing this method, you're also separating style from logic, which is generally seen as a best practice.

var clicked = false;
$('body').on('click', '.button', function(){

if (clicked) {
    $('.box').addClass('enlarged');
    clicked = false;
} else {
    $('.box').removeClass('enlarged');
    clicked = true;
}

});

Additionally, make sure to include a CSS class like the following:

.enlarged {
    width: 110px; 
}

I've also removed the button-1 and button-2 classes and instead applied the 'button' class directly to the div.

jquery persistently selects element even after altering the class

Answer №1

Answer №2

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