jQuery function to remove all "data-" attributes from a given element

gistfile1.js

// Note: This is an improved version provided by @laurentmuller in the comments below.

// removes all data attributes from a target element
// example:  removeDataAttributes('#user-list');
function removeDataAttributes(target) {
    var $target = $(target);
    
    // Loop through data attributes.
    $.each($target.data(), function (key) {
        // Because each key is in camelCase,
        // we need to convert it to kabob-case and store it in attr.
        var attr = 'data-' + key.replace(/([A-Z])/g, '-$1').toLowerCase(); 
        // Remove the attribute.
        $target.removeAttr(attr);
    });
};

You don't need the regular expression

for (let key in element.dataset)
    delete element.dataset[key];

When you delete a dataset element, the attribute is removed automatically