Magento 2.2.6: cookies.js blocked > Minicart not working, infinite checkout loader.

[NostiLoke]

Preconditions (*)

1. PHP 7.1
2. Fresh Magento 2.2.6 installtion (without and with sample data) - no admin settings changed
3. AdBlock-Extension in Chrome

Steps to reproduce (*)

1. Reload page (F5)
2. Add article to cart
3. Go to checkout

Expected result (*)

1. Article (and number) should be shown in the minicart.
2. Link with the "Proceed to Checkout" is visible
   
3. Checkout is useable and loader disappers after page is loaded

Actual result (*)

1. Adblock activated. After page load "/mage/cookies.js net::ERR_BLOCKED_BY_CLIENT"
   [ERROR] Failed to load the "Magento_Checkout/js/view/minicart" component.
   

2. After adding article to cart, minicart is shown as empty (and with no numer).
   

3. After opening the /checkout/ manually - cookies.js still is blocked, loader doesn't disapear
   

Similar issues where "real tracking" was blocked, but not cookies.js:
Solutions don't help with this issue:

Checkout 'hangs' in paymentstep when adblocker blocks Magento google-analytics javsascript file. #11208
Fix infinite checkout loader when some script wasn't loaded correctly because of network error #14874

[magento-engcom-team]

Hi @NostiLoke. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

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Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

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@NostiLoke do you confirm that you was able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

[NostiLoke]

@magento-engcom-team give me 2.2.6 instance

[magento-engcom-team]

Hi @NostiLoke. Thank you for your request. I'm working on Magento 2.2.6 instance for you

[magento-engcom-team]

Hi @NostiLoke, here is your Magento instance.
Admin access: http://ec2-34-228-235-121.compute-1.amazonaws.com/i-18636-2-2-6//admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[NostiLoke]

The issue is reproduceable.
Adblock blocks the cookies.js - this results in:
[ERROR] Failed to load the "Magento_Checkout/js/view/minicart" component.

Reason is an entry in the Fanboy's Annoyance List
/mage/cookies.
https://easylist.to/easylist/fanboy-annoyance.txt

[magento-engcom-team]

Hi @engcom-backlog-nazar. Thank you for working on this issue.
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[DanielRuf]

Reason is an entry in the Fanboy's Annoyance List
/mage/cookies.
https://easylist.to/easylist/fanboy-annoyance.txt

Which should be changed there. Not an issue on our side.

[DanielRuf]

https://github.com/easylist/easylist
https://github.com/easylist/easylist/blob/master/fanboy-addon/fanboy_cookie_general_block.txt#L457
https://github.com/ryanbr/fanboy-adblock/issues

[NostiLoke]

the cookies.js is also blocked in magento 1.9., but this doesn't break the checkout.
Is the cookies.js so important that therefore the "Magento_Checkout/js/view/minicart" component can't be loaded?
Blocking google analytics ends in the same issue: #12428
Sounds like an problem with handling the blocked components like described in similar posts mentioned above.

[DanielRuf]

Yes it is a required dependency for other modules and to handle the cookies.
This is how requireJS works.

There might be (good) reasons why they added it to the blocklist.
In general I do not get this issue with the default setup of uBlock origin.

[DanielRuf]

See https://github.com/magento/magento2/blob/2.3-develop/lib/web/mage/cookies.js.
It is directly referenced in the sidebar of the checkout and page-cache.

[DanielRuf]

Not sure why this was added just because of one website / domain.
easylist/easylist@0ceae38

[DanielRuf]

Also see ryanbr/fanboy-adblock#532 and easylist/easylist@cc91406