├── README.md
└── SR
    └── CheckoutAdditionalField
        ├── registration.php
        ├── etc
            ├── module.xml
            └── frontend
            │   └── di.xml
        ├── composer.json
        └── Plugin
            └── Checkout
                └── Model
                    └── Checkout
                        └── LayoutProcessor.php


/README.md:
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1 | Setup step:
2 | 
3 | 1. copy SR folder inside app/code
4 | 2. var folder permission should be 777
5 | 3. run following command 'php bin/magento setup:upgrade'
6 | 4. var folder permission should be 777
7 | 


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/SR/CheckoutAdditionalField/registration.php:
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1 | <?php
2 | \Magento\Framework\Component\ComponentRegistrar::register(
3 |     \Magento\Framework\Component\ComponentRegistrar::MODULE,
4 |     'SR_CheckoutAdditionalField',
5 |     __DIR__
6 | );
7 | 


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/SR/CheckoutAdditionalField/etc/module.xml:
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1 | <?xml version="1.0"?>
2 | <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
3 |     <module name="SR_CheckoutAdditionalField" setup_version="2.0.0">
4 |         <sequence>
5 |             <module name="Magento_Checkout"/>
6 |         </sequence>
7 |     </module>
8 | </config>
9 | 


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/SR/CheckoutAdditionalField/etc/frontend/di.xml:
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1 | <?xml version="1.0"?>
2 | <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
3 |     <type name="Magento\Checkout\Block\Checkout\LayoutProcessor">
4 |         <plugin name="sr_add_custom_field" type="SR\CheckoutAdditionalField\Plugin\Checkout\Model\Checkout\LayoutProcessor" sortOrder="100"/>
5 |     </type>
6 | </config>


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/SR/CheckoutAdditionalField/composer.json:
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 1 | {
 2 |     "name": "sr/module-checkoutadditionalfield",
 3 |     "description": "Checkout Additional Field",
 4 |     "require": {
 5 |         "php": "~5.5.0|~5.6.0|~7.0.0",
 6 |         "magento/framework": "100.0.*",
 7 |         "magento/module-ui": "100.0.*",
 8 |         "magento/module-config": "100.0.*",
 9 |         "magento/module-checkout": "100.0.*"
10 |     },
11 |     "type": "magento2-module",
12 |     "version": "100.0.0",
13 |     "license": [
14 |         "OSL-3.0",
15 |         "AFL-3.0"
16 |     ],
17 |     "autoload": {
18 |         "files": [ "registration.php" ],
19 |         "psr-4": {
20 |             "SR\\CheckoutAdditionalField\\": ""
21 |         }
22 |     }
23 | }


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/SR/CheckoutAdditionalField/Plugin/Checkout/Model/Checkout/LayoutProcessor.php:
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 1 | <?php
 2 | namespace SR\CheckoutAdditionalField\Plugin\Checkout\Model\Checkout;
 3 | 
 4 | 
 5 | class LayoutProcessor
 6 | {
 7 |     /**
 8 |      * @param \Magento\Checkout\Block\Checkout\LayoutProcessor $subject
 9 |      * @param array $jsLayout
10 |      * @return array
11 |      */
12 |     public function afterProcess(
13 |         \Magento\Checkout\Block\Checkout\LayoutProcessor $subject,
14 |         array  $jsLayout
15 |     ) {
16 |         $jsLayout['components']['checkout']['children']['steps']['children']['shipping-step']['children']
17 |         ['shippingAddress']['children']['shipping-address-fieldset']['children']['delivery_date'] = [
18 |             'component' => 'Magento_Ui/js/form/element/abstract',
19 |             'config' => [
20 |                 'customScope' => 'shippingAddress',
21 |                 'template' => 'ui/form/field',
22 |                 'elementTmpl' => 'ui/form/element/date',
23 |                 'options' => [],
24 |                 'id' => 'delivery-date'
25 |             ],
26 |             'dataScope' => 'shippingAddress.delivery_date',
27 |             'label' => 'Delivery Date',
28 |             'provider' => 'checkoutProvider',
29 |             'visible' => true,
30 |             'validation' => [],
31 |             'sortOrder' => 250,
32 |             'id' => 'delivery-date'
33 |         ];
34 | 
35 |         $jsLayout['components']['checkout']['children']['steps']['children']['shipping-step']['children']
36 |         ['shippingAddress']['children']['shipping-address-fieldset']['children']['drop_down'] = [
37 |             'component' => 'Magento_Ui/js/form/element/select',
38 |             'config' => [
39 |                 'customScope' => 'shippingAddress',
40 |                 'template' => 'ui/form/field',
41 |                 'elementTmpl' => 'ui/form/element/select',
42 |                 'id' => 'drop-down',
43 |             ],
44 |             'dataScope' => 'shippingAddress.drop_down',
45 |             'label' => 'Drop Down',
46 |             'provider' => 'checkoutProvider',
47 |             'visible' => true,
48 |             'validation' => [],
49 |             'sortOrder' => 251,
50 |             'id' => 'drop-down',
51 |             'options' => [
52 |                 [
53 |                     'value' => '',
54 |                     'label' => 'Please Select',
55 |                 ],
56 |                 [
57 |                     'value' => '1',
58 |                     'label' => 'First Option',
59 |                 ]
60 |             ]
61 |         ];
62 | 
63 |         return $jsLayout;
64 |     }
65 | }


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