# Adding mass actions

**You can select one or multiple items in a grid and then apply mass actions if they are defined. Here you will learn how to define mass actions in the XML layout.**

## XML layout definition
Filters can be added via the XML layout argument `mass_actions`. Each mass action has a label, URL and optional URL parameters. The Magento code has a lot of mass action URLs already defined for its own entities. Reuse them where needed.

```xml
<block>
    <arguments>
        <argument name="mass_actions" xsi:type="array">
            <item name="enable" xsi:type="array">
                <item name="label" xsi:type="string">Enable</item>
                <item name="url" xsi:type="string">catalog/product/massStatus</item>
                <item name="url_parameters" xsi:type="array">
                    <item name="status" xsi:type="number">1</item>
                </item>
            </item>
        </argument>
    </arguments>
</block>
```

See the [grid reference](/admin-components/grid/reference-grid-arguments) for more details.

## Class-based definition
Instead of defining the mass action via XML layout, you can also use a PHP class for this. For this, create a new class that implements `Loki\AdminComponents\Grid\MassAction\MassActionInterface` and pass it as follows:

```xml
<block>
    <arguments>
        <argument name="mass_actions" xsi:type="array">
            <item name="custom" xsi:type="object">
                YireoTraining\Example\Grid\GridFilter\CustomGridFilter
            </item>
        </argument>
    </arguments>
</block>
```

Your custom class could extend from `Loki\AdminComponents\Grid\MassAction\MassAction` but this is not required.

## How it works
Each mass action definition is being read by the `GridViewModel` class. If the definition is an array, it is passed to the `Loki\AdminComponents\Grid\MassAction\MassActionFactory` class for creating a new instance of `Loki\AdminComponents\Grid\MassAction\MassAction`. 

The list of mass action instances is passed on the PHTML template and rendered as a simple dropdown. When a mass action is selected from the dropdown, the Alpine method `massAction()` is being called. This method gathers the selected items in the grid, populates a hidden form `massActionForm` with this, adds a proper form action URL and submits the form.