The «view_block_abstract_to_html_after» event has been added to the \Magento\Framework\View\Element\AbstractBlock::toHtml() method since Magento 2.2

dmitry_fedyuk · May 6, 2017, 10:33am

Magento 2.1.6

magento/magento2/blob/2.1.6/lib/internal/Magento/Framework/View/Element/AbstractBlock.php#L635-L669


/**
 * Produce and return block's html output
 *
 * This method should not be overridden. You can override _toHtml() method in descendants if needed.
 *
 * @return string
 */
public function toHtml()
{
    $this->_eventManager->dispatch('view_block_abstract_to_html_before', ['block' => $this]);
    if ($this->_scopeConfig->getValue(
        'advanced/modules_disable_output/' . $this->getModuleName(),
        \Magento\Store\Model\ScopeInterface::SCOPE_STORE
    )) {
        return '';
    }


    $html = $this->_loadCache();
    if ($html === false) {
        if ($this->hasData('translate_inline')) {
            $this->inlineTranslation->suspend($this->getData('translate_inline'));
        }


        $this->_beforeToHtml();
        $html = $this->_toHtml();
        $this->_saveCache($html);


        if ($this->hasData('translate_inline')) {
            $this->inlineTranslation->resume();
        }
    }
    $html = $this->_afterToHtml($html);


    return $html;
}

Magento 2.2

github.com

magento/magento2/blob/62667cb6/lib/internal/Magento/Framework/View/Element/AbstractBlock.php#L641-L682


/**
 * Produce and return block's html output
 *
 * This method should not be overridden. You can override _toHtml() method in descendants if needed.
 *
 * @return string
 */
public function toHtml()
{
    $this->_eventManager->dispatch('view_block_abstract_to_html_before', ['block' => $this]);
    $this->getModuleName();


    $html = $this->_loadCache();
    if ($html === false) {
        if ($this->hasData('translate_inline')) {
            $this->inlineTranslation->suspend($this->getData('translate_inline'));
        }


        $this->_beforeToHtml();
        $html = $this->_toHtml();
        $this->_saveCache($html);


        if ($this->hasData('translate_inline')) {
            $this->inlineTranslation->resume();
        }
    }
    $html = $this->_afterToHtml($html);


    /** @var \Magento\Framework\DataObject */
    $transportObject = new \Magento\Framework\DataObject(
        [
            'html' => $html,
        ]
    );
    $this->_eventManager->dispatch('view_block_abstract_to_html_after', [
        'block' => $this,
        'transport' => $transportObject
    ]);
    $html = $transportObject->getHtml();


    return $html;
}