How to add select all button in export products using plugin in Magento 2?

If you want to implement “add select all button in Export Product” functionality in Magento 2, then please follow the below step.

Step 1. Create Magemonkey/Exportproduct/registration.php file and add below code

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Magemonkey_Exportproduct',
    __DIR__
);

<?php

\Magento\Framework\Component\ComponentRegistrar::register(

\Magento\Framework\Component\ComponentRegistrar::MODULE,

'Magemonkey_Exportproduct',

__DIR__

);

Step 2. Create file of Magemonkey/Exportproduct/etc/module.xml

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="Magemonkey_Exportproduct" setup_version="1.0.0">
        <sequence>
            <module name="Magento_Backend"/>
        </sequence>
    </module>
</config>

<?xml version="1.0" ?>

</sequence>

</module>

</config>

Step 3. Create file of Magemonkey/Exportproduct/etc/adminhtml/di.xml

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Backend\Block\Widget\Grid\Extended">
        <plugin disabled="false" name="Magemonkey_Exportproduct_Plugin_Backend_Magento_Backend_Block_Widget_Grid_Extended" sortOrder="10" type="Magemonkey\Exportproduct\Plugin\Backend\Magento\Backend\Block\Widget\Grid\Extended"/>
    </type>
</config>

<?xml version="1.0" ?>

</type>

</config>

Step 4. Create plugin file of Magemonkey/Exportproduct/Plugin/Backend/Magento/Backend/Block/Widget/Grid/Extended.php

<?php
namespace Magemonkey\Exportproduct\Plugin\Backend\Magento\Backend\Block\Widget\Grid;
class Extended
{
    protected $request;

	public function __construct(
        \Magento\Framework\App\Request\Http $request
    ){
        $this->request = $request;
    }
    public function afterGetMainButtonsHtml(
        \Magento\Backend\Block\Widget\Grid\Extended $subject,
        $result
    ) {
    	$moduleName = $this->request->getModuleName();
        $controller = $this->request->getControllerName();
        $action     = $this->request->getActionName();
        $route      = $this->request->getRouteName();

        if($controller == 'export' && $action == 'getFilter'){ //check controller and action
        $result .= '<button id="" title="Select All" type="button" class="action-default scalable action-reset action-tertiary" onclick="export_filter_gridJsObject.selectAll()" data-action="grid-filter-reset" data-ui-id="widget-button-3"><span>Select All</span></button>';
    	}else{
    	$result .= '';
    	}
        return $result;
    }
}

<?php

namespace Magemonkey\Exportproduct\Plugin\Backend\Magento\Backend\Block\Widget\Grid;

class Extended

{

protected $request;

public function __construct(

\Magento\Framework\App\Request\Http $request

){

$this->request = $request;

}

public function afterGetMainButtonsHtml(

\Magento\Backend\Block\Widget\Grid\Extended $subject,

$result

) {

$moduleName = $this->request->getModuleName();

$controller = $this->request->getControllerName();

$action = $this->request->getActionName();

$route = $this->request->getRouteName();

if($controller == 'export' && $action == 'getFilter'){ //check controller and action

$result .= '<button id="" title="Select All" type="button" class="action-default scalable action-reset action-tertiary" onclick="export_filter_gridJsObject.selectAll()" data-action="grid-filter-reset" data-ui-id="widget-button-3"><span>Select All</span></button>';

}else{

$result .= '';

}

return $result;

}

Step 5. Override the /vendor/magento/module-import-export/view/adminhtml/templates/export/form/filter/after.phtml file and add below code after line 18

export_filter_gridJsObject.selectAll = function () {
            // class admin__control-checkbox is selector 
            var inputs = document.getElementsByClassName("admin__control-checkbox");
            for(var i = 0; i < inputs.length; i++) {
                if(inputs[i].type == "checkbox") {
                    inputs[i].checked = true;
                }
            }
        };

export_filter_gridJsObject.selectAll = function () {

// class admin__control-checkbox is selector

var inputs = document.getElementsByClassName("admin__control-checkbox");

for(var i = 0; i < inputs.length; i++) {

if(inputs[i].type == "checkbox") {

inputs[i].checked = true;

}

};

Note. Create the admin theme using this link and follow that step https://magemonkeys.com/magento-2-change-default-logo-of-admin-panel

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