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Update the block through ajax

I have added a block which shows the no of items added to an entity. I want to refresh the block through ajax as the items are added to an entity through ajax form so whenever I add an item, it will refresh or re-render the block content too.

I found some of the modules, but they are in Drupal 7 and not available for D8 so I want to make it done with my custom module but didn’t find anything useful.

UPDATED

I have added the class attribute with the block and whenever I add any items, I made an ajax request through javascript which calls the respective controller and at the same time, I run this too–

// This is a part of the controller function from where I am calling below defined methods. $this->updateBlock();  protected function getBlock() {     $block = $this->blockManager->createInstance('block_id', []);     return $block; }  public function updateBlock() {     $block = $this->getBlock();     $this->response->addCommand(new ReplaceCommand('.block--class', $block->build()));     return $this->response;

}

But It is not updating the block.

This article was republished from its original source.
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Update the block through ajax

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