How to add To cart and custom Quantity Field in Woo commerce with Plus and minus button

 Quantity Box With Add to Cart button

<form class="cart" method="post" enctype="multipart/form-data">

    <div class="quantity">

        <button type="button" class="minus" >-</button>

        <input type="number" step="1" min="1" max="" name="quantity" value="1" title="Quantity" class="input-text qty text" size="4" pattern="[0-9]*" inputmode="numeric">

        <button type="button" class="plus" >+</button>

    </div>

 <input type="hidden" name="add-to-cart" value="<?php echo get_the_ID(); ?>">

<button type="submit" class="single_add_to_cart_button button alt shop-button-cart"><i class="fa fa-cart-plus" aria-hidden="true"></i> Add to cart</button>

</form>

Script to make the Minus Plus button work for Quantity box

<script>

    jQuery(document).ready(function($){

   $('form.cart').on( 'click', 'button.plus, button.minus', function() {

            var qty = $( this ).closest( 'form.cart' ).find( '.qty' );

            var val   = parseFloat(qty.val());

            var max = parseFloat(qty.attr( 'max' ));

            var min = parseFloat(qty.attr( 'min' ));

            var step = parseFloat(qty.attr( 'step' ));

            if ( $( this ).is( '.plus' ) ) {

               if ( max && ( max <= val ) ) {

                  qty.val( max );

               } else {

                  qty.val( val + step );

               }

            } else {

               if ( min && ( min >= val ) ) {

                  qty.val( min );

               } else if ( val > 1 ) {

                  qty.val( val - step );

               }

            }

         });

    });

</script>

Notification to any email address with add to cart woocommerce

 add_action( 'woocommerce_add_to_cart', 'cwpai_woo_send_email_to_admin_on_add_to_cart', 10, 6 );

function cwpai_woo_send_email_to_admin_on_add_to_cart( $cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data ) {

  

    $product      = wc_get_product( $product_id );

    $product_name = $product->get_name();

    if ( isset( $_POST['add-to-cart']) ) {

    $company_name =  $_POST['membership_company_name'];

    $contact_person =  $_POST['membership_contact_person'];

    $membership_address =  $_POST['membership_address'];

    $membership_city_town =  $_POST['membership_city_town'];

    $province =  $_POST['province'];

    $postal_code =  $_POST['postal_code'];

    $wcb =  $_POST['wcb'];

    $industry_code_s =  $_POST['industry_code_s'];

    $cor =  $_POST['cor'];

    $expiry_date =  $_POST['expiry_date'];

    $if_your =  $_POST['if_your'];

    }

$data = "<table style='width:50%' cellpadding='5'><tr>

   <th>Item</th>

   <th>Description</th>

   </tr><tr>

   <td>Name</td>

   <td>$product_name</td>

   </tr>

   <tr>

   <td>Company Name:</td>

   <td>$company_name</td>

   </tr>

   <tr>

   <td>Address</td>

   <td>$membership_address</td>

   </tr>

   <tr>

   <td>City/Town</td>

   <td>$membership_city_town</td>

   </tr>

   <tr>

   <td>Province</td>

   <td>$province</td>

   </tr>

   <tr>

   <td>Postal Code</td>

   <td>$postal_code</td>

   </tr>

   <tr>

   <td>WCB #</td>

   <td>$wcb</td>

   </tr>

   <tr>

   <td>Industry Code(s)</td>

   <td>$industry_code_s</td>

   </tr>

   <tr>

   <td>C.O.R #</td>

   <td>$cor</td>

   </tr>

   <tr>

   <td>Expiry Date</td>

    <td>$expiry_date</td>

   </tr>

   <tr>

    <td>If your company has ever registered with another Certifying Partner please name</td>

    <td>$if_your</td>

    </tr></table>";

$headers = array('Content-Type: text/html; charset=UTF-8');

    wp_mail( 'example@gmail.com', 'New notification', $data, $headers );

 

}