javascript - minicart.js not working, cart is not popping up -

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i using minicart.js simple paypal shopping cart. not working should. cart not popping if click 'add cart' button.

here's code.

<html> <body>         <script src="//cdnjs.cloudflare.com/ajax/libs/minicart/3.0.3/minicart.min.js"></script>         <script>             paypal.minicart.render();         </script>           <form action="https://www.paypal.com/cgi-bin/webscr" method="post">                 <input type="hidden" name="cmd" value="_cart" />                 <input type="hidden" name="add" value="1" />                 <input type="hidden" name="business" value="labs-feedback-minicart@paypal.com" />                 <input type="hidden" name="item_name" value="test product" />                 <input type="hidden" name="quantity" value="1" />                 <input type="hidden" name="amount" value="1.00" />                 <input type="hidden" name="currency_code" value="usd" />                 <input type="hidden" name="no_shipping" value="2">                 <input type="hidden" name="no_note" value="1">                 <input type="hidden" name="shipping2" value="1.50">                 <input type="hidden" name="shipping" value="2.50">                 <strong>test product</strong>                  <p>                     <label><input type="checkbox" id="terms" name="terms" value="" /> agree terms</label>                 </p>                  <input type="submit" name="submit" value="add cart" />             </form>      <script>         paypal.minicart.render();          paypal.minicart.cart.on('checkout', function (evt) {             var hasagreed = !!document.getelementbyid('terms').checked;              if (!hasagreed) {                 alert('you must agree terms!');         evt.preventdefault();             }         });     </script> </body> </html>

here actual site. , found error in console said: 

uncaught typeerror: cannot call method 'appendchild' of null

i not sure how fix this, please let me know what's wrong setup. thanks.

you need change add cart button not saved on paypal (in profit , loss section) , unprotect code after button created right before copy , paste :)

hope helps :)


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