How to get configurable product children ids Magento 2?

To get all the children product ids from the configurable product in Magento 2, you need to retrieve the list of child item ids by the configurable product id.

<?php
namespace Magemonkeys\ChildIds\Model;

use Magento\ConfigurableProduct\Model\Product\Type\Configurable;

class ConfigurableChildrenIds
{    
    private $configurable;
    public function __construct(
        Configurable $configurable
    ) {
        $this->configurable = $configurable;
    }
    
    public function getChildrenIds(int $id)
    {
        $childItemId = $this->configurable->getChildrenIds($id);
        return $childItemId;
    }
} ?>

<?php

namespace Magemonkeys\ChildIds\Model;

use Magento\ConfigurableProduct\Model\Product\Type\Configurable;

class ConfigurableChildrenIds

{

private $configurable;

public function __construct(

Configurable $configurable

) {

$this->configurable = $configurable;

}

public function getChildrenIds(int $id)

{

$childItemId = $this->configurable->getChildrenIds($id);

return $childItemId;

}

} ?>

List out the children items id for a configurable product by using below commands.

$configurableId = 1478;
$superAttributeByChild = $this->getChildrenIds($configurableId);

1 2	$configurableId = 1478; $superAttributeByChild = $this->getChildrenIds($configurableId);

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