JSFiddle - React, Tailwind, and code Playground

HTML

<label class="option" for="edit-attributes-21-33" id="example">
     <input type="radio" id="edit-attributes-21-33" name="attributes[21]" 
    value="33" checked="checked" class="form-radio"/>4 oz, +$15.00
 </label>

JavaScript

var node = document.getElementById("example").childNodes[2];
node.nodeValue = node.nodeValue.replace("+", "");