Get layered navigation attributes list Magento 2

Get all the attributes which are used in layered navigation in category & search page.

You can get all the filterable attribute list from Magento\Catalog\Model\ResourceModel\Product\Attribute\CollectionFactory class.

As a result, you will get that,

all those attributes which have been used in Layered Navigation status are Filterable (with results) or Filterable (no results).

So, you need to create __construct( ) function for define dependency of Class.

<?php
    private $checkoutSession;

    public function __construct(
        \Magento\Catalog\Model\ResourceModel\Product\Attribute\CollectionFactory $productAttributeCollectionFactory
    ) {
        $this->productAttributeCollectionFactory = $productAttributeCollectionFactory;
    }

    public function getFilterableAttributes()
    {
        /** @var \Magento\Catalog\Model\ResourceModel\Product\Attribute\Collection $productAttributes */
        $productAttributes = $this->productAttributeCollectionFactory->create();
        $productAttributes->addFieldToFilter(
            ['is_filterable', 'is_filterable_in_search'],
            [[1, 2], 1]
        );

        return $productAttributes;
    }

<?php

private $checkoutSession;

public function __construct(

\Magento\Catalog\Model\ResourceModel\Product\Attribute\CollectionFactory $productAttributeCollectionFactory

) {

$this->productAttributeCollectionFactory = $productAttributeCollectionFactory;

}

public function getFilterableAttributes()

{

/** @var \Magento\Catalog\Model\ResourceModel\Product\Attribute\Collection $productAttributes */

$productAttributes = $this->productAttributeCollectionFactory->create();

$productAttributes->addFieldToFilter(

['is_filterable', 'is_filterable_in_search'],

[[1, 2], 1]

);

return $productAttributes;

}

Now call a function in template file by iterating over a loop to fetch each attribute code,

$getAttributes = $block->getFilterableAttributes();

    foreach ($getAttributes as $attribute) {
        echo $attribute->getAttributeCode();echo "<br>";
    }

$getAttributes = $block->getFilterableAttributes();

foreach ($getAttributes as $attribute) {

echo $attribute->getAttributeCode();echo "<br>";

}

You can get all the filterable attribute used for your store.

The Result

    price
    manufacturer
    color
    activity
    style_bags
    material
    strap_bags
    features_bags
    gender
    category_gear
    size
    eco_collection
    performance_fabric
    erin_recommends
    new
    sale
    format
    style_bottom
    style_general
    sleeve
    collar
    pattern
    climate

price

manufacturer

color

activity

style_bags

material

strap_bags

features_bags

gender

category_gear

size

eco_collection

performance_fabric

erin_recommends

new

sale

format

style_bottom

style_general

sleeve

collar

pattern

climate

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