I need to make some changes to the following Magento files:
The question is; should I be editing these files?
Are they core files (that will be replaced if I upgraded Magento)?
If I shouldn't be editing them, what should I do if I want to change the contents of these files?
Suppose you want to override reload function of product.js
Follow the steps
-> Create a new folder under js folder, in our case under /js/jsoverride/
-> Now create a new js file, in our case we have created /js/jsoverride/product.js with the following code
Product.OptionsPrice.prototype.reload
= Product.OptionsPrice.prototype.reload.wrap(function(parentMethod){
alert(Override success);
});
-> Add the following code to the proper layout file(catalog.xml/local.xml)
<reference name=head>
<action method=addJs><script>varien/product.js</script></action>
<action method=addJs><script>jsoverride/product.js</script></action>
......
</reference>
Flush the cache after your are done with your update.
More information see wrap()
