What is the best way to navigate a class to the end of the queue?

My table cells have a specific class structure: class="a", and/or class="b": class="a b".

This is the CSS:

.a {
background-color:blue;
}
.b {
background-color:green;
}

When the classes intersect, the color becomes green. I want to implement a functionality where when a user hovers over a table cell, all cells containing that class change to that color.

My current implementation is as follows:

$('td.a').add('td.b').hover(function() {
    var myClassName = this.className;
    $('td.' + myClassName).each(function() {
        $(this).removeClass().addClass(myClassName);
    });
});

The problem with this code is that it only works once because removeClass() is destructive.

Answer №1

Perhaps I am misunderstanding your query, and if so, I extend my apologies.


If you want to apply a style on hover when an element has either class a or class b, use the following selector:

.a:hover, .b:hover {
    /* Styles for Hover state */
}

Alternatively, to style something on hover only if it has both class a and class b, you can use this selector:

.a.b:hover {
    /* Styles for Hover state */
}

Could you kindly provide further clarification on your question?

Answer №2

Method 1

Utilize a different CSS class as a temporary placeholder.

$('.a').hover(function() {
    $('.a.b').addClass('b-holder').removeClass('b');
}, function() {
    $('.a.b-holder').addClass('b').removeClass('b-holder');
});

.a.b targets elements with both classes applied.

Demo: http://jsfiddle.net/wdm954/ZhRvG/


Method 2

Include a third class in your style sheet for better control.

Demo: http://jsfiddle.net/wdm954/Lg3aG/2/

CSS...

.a {
    background-color:blue;
}
.b {
    background-color:green;
}
.ab {
    background-color:blue;
}

jQuery...

$('.a').hover(function() {
    $('.a.b').toggleClass('ab');
});

Method 3

Apply inline styles to override existing stylesheet rules.

$('.a').hover(function() {
    $('.a.b').css('background-color', 'blue');
}, function() {
    $('.a.b').css('background-color', 'green');
});

Demo: http://jsfiddle.net/wdm954/Jj4SB/

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