Loading frontend child product results in empty page until page is reloaded

[Thomas Kampp]

Viewing a products with child products. When choosing a child product the page reloads and goes to the child product. But the page is empty! If reloading (F5) the page the correct page is shown.

Reproduction of problem - click this link, choose different size (child product). The page is now empty. Try reloading.
https://danishcaresupply.dk/shop/hj%C3%A6lpredskaber-til-havearbejdet/test-produkt-demo-med-det-hele-detaljer

I have tested:

• Switching to another template results in the same problem.
• GZIP, caching and minify is switched off.
• There is no error output even if switched on.

Setup:
VM: 3.4.0 (did not work on VM 3.2 either)
Joomla: 3.8.13
PHP: 7.1.20

What can the problem be?

[Jörgen]

Takes forever to load.
Clicking here on 81 cm
https://danishcaresupply.dk/shop/hj%C3%A6lpredskaber-til-havearbejdet/test-produkt-demo-med-det-hele-detaljer
Gets me to this page. With a clickable image and a clickable link.
https://danishcaresupply.dk/pa-og-afklaedning/sko/elastiske-sn%C3%B8reb%C3%A5nd/test-produkt-demo-med-det-hele-2-detaljer
Here I can click to this page:
https://danishcaresupply.dk/pa-og-afklaedning/sko/elastiske-sn%C3%B8reb%C3%A5nd/elastiske-snorebaand-brun-141215-detaljer

Have You tried with SEF off ?
Check also with Protostar.

Jörgen @ Kreativ Fotografi

[GJC Web Design]

Has to be your template .. the ajax retuurns the correct content -- try

https://danishcaresupply.dk/hj%C3%A6lpredskaber-til-havearbejdet/test-produkt-demo-med-det-hele-2-detaljer?tmpl=component&format=html&dynamic=1

but I suspect your template hasn't the correct div id to display it correctly

all that renders is the related products

[Thomas Kampp]

Have You tried with SEF off ?
Check also with Protostar.

Jörgen @ Kreativ Fotografi

It does not work with SEF off either.
It does not work with protostar (or protostar and SEF off).

[GJC Web Design]

Has to be your template .. the ajax retuurns the correct content -- try

https://danishcaresupply.dk/hj%C3%A6lpredskaber-til-havearbejdet/test-produkt-demo-med-det-hele-2-detaljer?tmpl=component&format=html&dynamic=1

but I suspect your template hasn't the correct div id to display it correctly

all that renders is the related products

[Thomas Kampp]

Has to be your template .. the ajax retuurns the correct content -- try

https://danishcaresupply.dk/hj%C3%A6lpredskaber-til-havearbejdet/test-produkt-demo-med-det-hele-2-detaljer?tmpl=component&format=html&dynamic=1

but I suspect your template hasn't the correct div id to display it correctly

all that renders is the related products

The child product switch does not work in the tmpl=component&format=html&dynamic=1 version either. It is the same problem as described in my first entry. Not even if the protostar template is used at the same time does it work

I think that we can rule out the template even though it is the obvious choice.

[Milbo]

But this link here https://danishcaresupply.dk/hj%C3%A6lpredskaber-til-havearbejdet/test-produkt-demo-med-det-hele-2-detaljer?tmpl=component&format=html&dynamic=1
was loaded in my case below 1 sec.

[Thomas Kampp]

But this link here https://danishcaresupply.dk/hj%C3%A6lpredskaber-til-havearbejdet/test-produkt-demo-med-det-hele-2-detaljer?tmpl=component&format=html&dynamic=1
was loaded in my case below 1 sec.

It is not about load time. The problem is you need to click Refresh (F5) before the page with the child product is viewed. Until then it only shows "Related products".

Here is what I get: http://recordit.co/YoVla1Wcbb
It should not be necessary for the user to refresh the page manually every time.

[GJC Web Design]

what do u mean with

The child product switch does not work in the tmpl=component&format=html&dynamic=1 version either.

I am looking at it!

https://danishcaresupply.dk/hj%C3%A6lpredskaber-til-havearbejdet/test-produkt-demo-med-det-hele-2-detaljer?tmpl=component&format=html&dynamic=1

what DOESN'T happen is it isn't correctly loaded into your template with only the related products showing up until u refresh

[Thomas Kampp]

Please see my video. As you can see I have to click the reload button in order for the child product view to load correctly. This problem is the same weather or not I use protostar template, yootheme/site template, SEF on or off, use the tmpl=component... code or not. It is the same result with all constellations with these settings.

Do you ned experience the same?

[GJC Web Design]

I understand exactly the problem u are getting and I get the same

But what I am saying is .. when you select the dropdown an ajax call is made for the selected child and returned where it "replaces" the content in the div .productdetails-view via the dynupdate.js scripts

the url is e.g. https://danishcaresupply.dk/hj%C3%A6lpredskaber-til-havearbejdet/test-produkt-demo-med-det-hele-2-detaljer?tmpl=component&format=html&dynamic=1 which returns the correct content.

What ISN'T happening is the correct substitution of the content in that div -
the view below is missing so much code and all the JS - why?

[Thomas Kampp]

But that does not explain how it can work when the reload/refresh button is clicked?

It would be logical if it was an Virtuemart template override. But if I deactivate all the overrides the problem is still there even though it is using default Virtuemart code?

[GJC Web Design]

you need to debug the problem.. it is of course not a problem for other users so "something" is different on yours.

use the normal debug techniques  - start with a clean install .. add stuff until it breaks or compare the clean working with your broken

[Thomas Kampp]

That's just it. I feel that I have attempted changing everything and all constellations:

• SEF
• Overrides
• VM version
• Cache
• GZIP
• Template

So I don't really know where to look any longer...

[GJC Web Design]

install this -> http://dev.virtuemart.net/attachments/download/1145/VirtueMart3.4.2_Joomla_3.8.12-Stable-Full_Package.zip

takes 5 mins

does it work?

if so there's your starting point

If not then assume server related