Why Doesn't jQuery AddClass() Work on SVG Elements, and How Can I Fix It?

jQuery SVG Class Manipulation Issues

In the realm of jQuery SVG manipulation, users occasionally encounter difficulties adding or removing classes from SVG elements. A common scenario that triggers this problem is targeting SVG objects with jQuery and attempting to utilize the .addClass() method.

The code snippet provided highlights the issue:

<rect class="jimmy">

$(".jimmy").click(function() {
    $(this).addClass("clicked");
});

While the jQuery and SVG integration works flawlessly for event handling, class manipulation remains unsuccessful.

Underlying Cause

The root cause lies in the limited support for SVG class manipulation in jQuery versions prior to v3. This issue stems from the fact that jQuery handles SVG elements differently compared to HTML elements.

Solutions

Several solutions present themselves to address this problem:

• Embrace jQuery v3: jQuery v3 and above have resolved this limitation, enabling the seamless addition and removal of classes from SVG elements using .addClass() and .removeClass().
• Adopt Vanilla JavaScript: Modern browsers offer native support for class manipulation in SVG elements. Leveraging the classList.add() and classList.remove() methods provides a reliable alternative to jQuery.
• Harness jQuery's .attr() Method: If you prefer to stick with jQuery, consider utilizing the .attr() method to modify the class attribute directly.

// Add class using .attr()
$("#item").attr("class", "oldclass newclass");

// Remove class using .attr()
$("#item").attr("class", "oldclass");

• Embrace Vanilla JavaScript with .setAttribute(): Alternatively, you can use vanilla JavaScript to manipulate the class attribute.

// Add class using .setAttribute()
var element = document.getElementById("item");
element.setAttribute("class", "oldclass newclass");

// Remove class using .setAttribute()
element.setAttribute("class", "oldclass");

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