Leveraging jQuery's `.eq()` method on multiple class selectors

Is there a way to effectively utilize the 'eq' function on multiple classes? Due to the non-sequential nature of the divs with class 'a', I am encountering difficulties with using the 'eq' function to update their class. Interestingly, when the divs with class "b" are removed, the function operates flawlessly. Here is a snippet for reference: https://jsfiddle.net/9w8zhg7d/4/. Below is the HTML snippet:

<div class="a current">
</div>
<div class="a">
</div>
<div class="b">
</div>
<div class="b">
</div>
<div class="a">
</div>
<div class="a">
</div>

and the following javascript:

Class = {
    a: ".a",
    highlighted: ".a.current",
    init: function() {
        $(this.a).click(this.toggleA.bind(this));
    },
    toggleA: function(e) {
        e.preventDefault();
        $(this.highlighted).removeClass("current");
        var target = $(e.target);
        var clickedA = target.closest(this.a);
        var clickedIndex = clickedA.index();
        $(".a").eq(clickedIndex).addClass("current");
        console.log(clickedIndex);
        $(".b").eq(clickedIndex).css("display", "inline-block");
    }
};

Class.init();

Any assistance on this matter would be greatly appreciated!

Answer №1

It seems like you are looking to find the index of a specific .a element that was clicked, disregarding all other elements. To achieve this, you can utilize the .index() method in the following way:

var clickedIndex = $(this.a).index(e.target);

By calling .index() without any arguments, you are determining the position of the first element in the jQuery object relative to its siblings, not in relation to other elements in the jQuery object. The code snippet I provided selects all .a elements and then identifies the position of the e.target element within those elements.

You can simplify the process of adding the current class by directly using:

$(e.target).addClass("current");

Regarding how to apply the index of the clicked .a element to the .b elements, there seems to be a discrepancy in the number of elements. Nevertheless, combining the suggestions above with your code would result in something like this:

(You can find an improved version of your fiddle here: https://jsfiddle.net/9w8zhg7d/8/)

Answer №2

It seems to me that the proposed solution may be a bit complex. Have you considered this alternative approach?

HTML:

<div class="wrapper">
    <div class="item active"></div>
    <div class="item"></div>
    <div class="block"></div>
    <div class="block"></div>
    <div class="item"></div>
    <div class="item"></div>
</div>

CSS:

.wrapper {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
}

.wrapper > div {
  width: 50px;
  margin: 1em;
  height: 50px;
  background: black;
}

.item.active {
  background: red;
}

Javascript:

$('.wrapper > div').on('click', function() {
    $('.wrapper > div').removeClass("active");
    $(this).addClass('active')
});

This code will add the class .active to the clicked item while removing it from all others. By targeting the parent element, you can achieve this functionality without dealing with the specific classes of individual child elements.

Link to JsFiddle: https://jsfiddle.net/9w8zhg7f/9/

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