Display View refreshes on checkout cart quantity update

Hi,

It's normal that the onHikashopBeforeDisplayView trigger is called when the payment view is refreshed.
The javascript that you add that that point will be run by the browser, even in ajax.
However, you need to display it directly if you want it to be taken into account in ajax.
If you try to use the addScriptDeclaration or addScript functions of Joomla's library, then that javascript will be missing after the refresh as the ajax system only process the javascript directly echoed by the view being refreshed.
That's partly why you can see the javascript directly added with script tags in the show_block files of the checkout view instead of using addScriptDeclaration to add it to Joomla's document element. That way, the javascript is taken into account even in ajax.

Hello,

The checkout system is made to refresh the blocks where there is a need ; when something changed.
If the modification of the billing address affect something in a payment method (make it available, change its price, or else) ; the payment block will be automatically refresh.
We are not based on jQuery since there are too many issues and conflicts to be able to use it ; we do prefer classic Javascript (also called "vanialla")
Please note that the checkout system use "events" and that is mostly how the blocks are communicating.

There is no need of "ajaxComplete" feature since the javascript within the blocks will be processed. If your payment method have some custom html with some javascript, that javascript will be processed during the refresh of the block.
Afterwards, as Nicolas explained, you can still use the addScriptDeclaration in order to push the biggest part of your JS code in the header ; then you can use the events to be notified when a checkout block is refreshed (even if I think that the best is to use the custom html to push the specific JS).

Regards,