JSFiddle - React, Tailwind, and code Playground

HTML

<div id="your-div">
    just <span>a</span> test
    <a href="http://www.google.de">m<span class="test">o</span>o</a>
    <div class="test2">hehehe</div>
    <span class="test">meow</span>
</div>

<button>Remote span attributes</button>

CSS

.test { color: #f00; }
.test2 { color: #0a0; }

JavaScript

$('button').click(function(e) {
    e.preventDefault();
    $('#your-div span').each(function() {
        var elem = this;
        $.each(elem.attributes, function(i, attr) {
            $(elem).removeAttr(attr.name);
        });
    });
});