2

It is required to show dynamic javascript userId var in head.additional block if the user is logged in, otherwise null.

So I am injecting my block into default layout handle

    <?xml version="1.0"?>
    <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">
        <body>
            <referenceContainer name="head.additional">
                <block class="Test\Test\Block\Head" name="testtest_head" />
            </referenceContainer>
        </body>
    </page>

in the block, I use this code and it works great

class Head extends Template
{
  ...
     protected function _afterToHtml($html)
     {
          return $html. $this->getMyUserIdCode();
     }

}

But when I enable the cache, userId won't refresh even if customer logged in. How can I properly avoid caching in this sutuation ?

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1 Answer 1

Reset to default
3

You will have to create helper for this.

File Path:

app/code/Vendor/Module/Helper/Data.php

Code:

<?php

namespace Vendor\Module\Helper;

use Magento\Customer\Model\Context;

class Data extends \Magento\Framework\App\Helper\AbstractHelper
{

    private $httpContext;

    public function __construct(
        \Magento\Framework\App\Helper\Context $context,
        \Magento\Framework\App\Http\Context $httpContext
    ) {
        parent::__construct($context);
        $this->httpContext = $httpContext;
    }

    public function isLoggedIn()    
    {
        $isLoggedIn = $this->httpContext->getValue(\Magento\Customer\Model\Context::CONTEXT_AUTH);
        return $isLoggedIn;
    }
}

And this you can reference in your phtml file.

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