Make 'Add to Cart' a link, instead of a button
<p>In category.tpl I changed:</p>

<pre><code>&lt;button type="button" onclick="cart.add('&lt;?php echo $product['product_id']; ?&gt;', '&lt;?php echo $product['minimum']; ?&gt;');"&gt;&lt;i class="fa fa-shopping-cart"&gt;&lt;/i&gt; &lt;span class="hidden-xs hidden-sm hidden-md"&gt;&lt;?php echo $button_cart; ?&gt;&lt;/span&gt;&lt;/button&gt;
</code></pre>

<p>to:</p>

<pre><code>&lt;a href="index.php?route=checkout/cart/add&amp;product_id=&lt;?php echo $product['product_id']; ?&gt;&amp;quantity=&lt;?php echo $product['minimum']; ?&gt;" method="get"&gt;&lt;i class="fa fa-shopping-cart"&gt;&lt;/i&gt; &lt;span class="hidden-xs hidden-sm hidden-md"&gt;&lt;?php echo $button_cart; ?&gt;&lt;/span&gt;&lt;/a&gt;
</code></pre>

<p>Clicking Add to Cart now loads the page background, with only:</p>

<blockquote>
  <p>[ ]</p>
</blockquote>

<p>as content.</p>

<p>I am trying to make a 'shareable' link, that when copied (into a newsletter, for example) clicking that link automatically adds the item to your cart.</p>

<p>Any suggestions on how to achieve this would be hugely appreciated!</p>