I just set this up for a client and followed the guide, he is on an older theme without the vendor.js and the button did not work either (javascript not firing correctly).
What I did to solve it. Instead of adding both of those javscript snippets/code into the top & bottom of the theme.js (or vendor.js) I added them to the very bottom of my theme.liquid right before the closing tag.
Here is what I added:
{% if template contains 'cart' %}
<script>
/**
* Module to add a shipping rates calculator to cart page.
*
* Copyright (c) 2011-2016 Caroline Schnapp (11heavens.com)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
* Modified by David Little, 2016
*/
"object"==typeof Countries&&(Countries.updateProvinceLabel=function(e,t){if("string"==typeof e&&Countries[e]&&Countries[e].provinces){if("object"!=typeof t&&(t=document.getElementById("address_province_label"),null===t))return;t.innerHTML=Countries[e].label;var r=jQuery(t).parent();r.find("select");r.find(".custom-style-select-box-inner").html(Countries[e].provinces[0])}}),"undefined"==typeof Shopify.Cart&&(Shopify.Cart={}),Shopify.Cart.ShippingCalculator=function(){var _config={submitButton:"Calculate shipping",submitButtonDisabled:"Calculating...",templateId:"shipping-calculator-response-template",wrapperId:"wrapper-response",customerIsLoggedIn:!1,moneyFormat:"${{amount}}"},_render=function(e){var t=jQuery("#"+_config.templateId),r=jQuery("#"+_config.wrapperId);if(t.length&&r.length){var templateSettings={evaluate:/<%([\s\S]+?)%>/g,interpolate:/<%=([\s\S]+?)%>/g,escape:/<%-([\s\S]+?)%>/g};var n=Handlebars.compile(jQuery.trim(t.text())),a=n(e);if(jQuery(a).appendTo(r),"undefined"!=typeof Currency&&"function"==typeof Currency.convertAll){var i="";jQuery("[name=currencies]").size()?i=jQuery("[name=currencies]").val():jQuery("#currencies span.selected").size()&&(i=jQuery("#currencies span.selected").attr("data-currency")),""!==i&&Currency.convertAll(shopCurrency,i,"#wrapper-response span.money, #estimated-shipping span.money")}}},_enableButtons=function(){jQuery(".get-rates").removeAttr("disabled").removeClass("disabled").val(_config.submitButton)},_disableButtons=function(){jQuery(".get-rates").val(_config.submitButtonDisabled).attr("disabled","disabled").addClass("disabled")},_getCartShippingRatesForDestination=function(e){var t={type:"POST",url:"/cart/prepare_shipping_rates",data:jQuery.param({shipping_address:e}),success:_pollForCartShippingRatesForDestination(e),error:_onError};jQuery.ajax(t)},_pollForCartShippingRatesForDestination=function(e){var t=function(){jQuery.ajax("/cart/async_shipping_rates",{dataType:"json",success:function(r,n,a){200===a.status?_onCartShippingRatesUpdate(r.shipping_rates,e):setTimeout(t,500)},error:_onError})};return t},_fullMessagesFromErrors=function(e){var t=[];return jQuery.each(e,function(e,r){jQuery.each(r,function(r,n){t.push(e+" "+n)})}),t},_onError=function(XMLHttpRequest,textStatus){jQuery("#estimated-shipping").hide(),jQuery("#estimated-shipping em").empty(),_enableButtons();var feedback="",data=eval("("+XMLHttpRequest.responseText+")");feedback=data.message?data.message+"("+data.status+"): "+data.description:"Error : "+_fullMessagesFromErrors(data).join("; ")+".","Error : country is not supported."===feedback&&(feedback="We do not ship to this destination."),_render({rates:[],errorFeedback:feedback,success:!1}),jQuery("#"+_config.wrapperId).show()},_onCartShippingRatesUpdate=function(e,t){_enableButtons();var r="";if(t.zip&&(r+=t.zip+", "),t.province&&(r+=t.province+", "),r+=t.country,e.length){"0.00"==e[0].price?jQuery("#estimated-shipping em").html("FREE"):jQuery("#estimated-shipping em").html(_formatRate(e[0].price));for(var n=0;n<e.length;n++)e[n].price=_formatRate(e[n].price)}_render({rates:e,address:r,success:!0}),jQuery("#"+_config.wrapperId+", #estimated-shipping").fadeIn()},_formatRate=function(e){function t(e,t){return"undefined"==typeof e?t:e}function r(e,r,n,a){if(r=t(r,2),n=t(n,","),a=t(a,"."),isNaN(e)||null==e)return 0;e=(e/100).toFixed(r);var i=e.split("."),o=i[0].replace(/(\d)(?=(\d\d\d)+(?!\d))/g,"$1"+n),s=i[1]?a+i[1]:"";return o+s}if("function"==typeof Shopify.formatMoney)return Shopify.formatMoney(e,_config.moneyFormat);"string"==typeof e&&(e=e.replace(".",""));var n="",a=/\{\{\s*(\w+)\s*\}\}/,i=_config.moneyFormat;switch(i.match(a)[1]){case"amount":n=r(e,2);break;case"amount_no_decimals":n=r(e,0);break;case"amount_with_comma_separator":n=r(e,2,".",",");break;case"amount_no_decimals_with_comma_separator":n=r(e,0,".",",")}return i.replace(a,n)};return _init=function(){new Shopify.CountryProvinceSelector("address_country","address_province",{hideElement:"address_province_container"});var e=jQuery("#address_country"),t=jQuery("#address_province_label").get(0);"undefined"!=typeof Countries&&(Countries.updateProvinceLabel(e.val(),t),e.change(function(){Countries.updateProvinceLabel(e.val(),t)})),jQuery(".get-rates").click(function(){_disableButtons(),jQuery("#"+_config.wrapperId).empty().hide();var e={};e.zip=jQuery("#address_zip").val()||"",e.country=jQuery("#address_country").val()||"",e.province=jQuery("#address_province").val()||"",_getCartShippingRatesForDestination(e)}),_config.customerIsLoggedIn&&jQuery(".get-rates:eq(0)").trigger("click")},{show:function(e){e=e||{},jQuery.extend(_config,e),jQuery(function(){_init()})},getConfig:function(){return _config},formatRate:function(e){return _formatRate(e)}}}();
// Shipping Calculator continued
Shopify.Cart.ShippingCalculator.show( {
submitButton: theme.strings.shippingCalcSubmitButton,
submitButtonDisabled: theme.strings.shippingCalcSubmitButtonDisabled,
customerIsLoggedIn: theme.strings.shippingCalcCustomerIsLoggedIn,
moneyFormat: theme.strings.shippingCalcMoneyFormat
} );
</script>
{% endif %}
Make sure you remove the code from the vendor.js or the theme.js.
