JSFiddle - React, Tailwind, and code Playground

HTML

<ul class="class-of-ul">
	<li  class="first post-230 product type-product status-publish has-post-thumbnail product_cat-c-20-heating-ventilating-and-ac product_cat-california-online-practice-exams product_tag-pro-11 taxable shipping-taxable purchasable product-type-simple product-cat-c-20-heating-ventilating-and-ac product-cat-california-online-practice-exams product-tag-pro-11 instock"><a href="#">66</a></li>
	<li  class="post-243 product type-product status-publish has-post-thumbnail product_cat-c-27-landscaping product_cat-california-online-practice-exams product_tag-pro-12 taxable shipping-taxable purchasable product-type-simple product-cat-c-27-landscaping product-cat-california-online-practice-exams product-tag-pro-12 instock"><a href="#">69</a></li>
	<li  class="post-60 product type-product status-publish has-post-thumbnail product_cat-california-contractor-law-and-business-exam-study-materials product_cat-california-online-practice-exams product_tag-pro-1 taxable shipping-taxable purchasable product-type-simple product-cat-california-contractor-law-and-business-exam-study-materials product-cat-california-online-practice-exams product-tag-pro-1 instock" ><a href="#">65</a></li>
	<li  class="last post-258 product type-product status-publish has-post-thumbnail product_cat-c-33-painting-and-decorating product_cat-california-online-practice-exams product_tag-pro-14 taxable shipping-taxable purchasable product-type-simple product-cat-c-33-painting-and-decorating product-cat-california-online-practice-exams product-tag-pro-14 instock" ><a href="#">68</a></li>
	<li  class="first post-158 product type-product status-publish has-post-thumbnail product_cat-a-general-engineering product_cat-california-online-practice-exams product_tag-pro-3 taxable shipping-taxable purchasable product-type-simple product-cat-a-general-engineering product-cat-california-online-practice-exams product-tag-pro-3 instock" ><a href="#">67</a></li>
</ul>

JavaScript

$(document).ready(function() {
    $("ul").append($("li").get().sort(function(a, b) {
        console.log("whoa");
        return parseInt($(a).attr("class").match(/\d+/), 10) 
        - parseInt($(b).attr("class").match(/\d+/), 10)
    }));
});