[Forminator Pro] - Add currency formatting to Calculation Fields

forminator_currency.php

<?php
/**
 * Plugin Name: [Forminator Pro] - Add currency formatting
 * Plugin URI: https://premium.wpmudev.org/
 * Description: Adds currency formatting in calculation fields
 * Author: Maciek Palmowski & Panos Lyrakis @ WPMUDEV
 * Author URI: https://premium.wpmudev.org/
 * License: GPLv2 or later
 */
add_action( 'wp_footer', function() {

	global $post;

	if ( ! $post instanceof WP_Post || ! has_shortcode( $post->post_content, 'forminator_form' ) ) {
		return;
	}


	?>
	<script type="text/javascript">

		(($,d)=>{
			if ( window.wpmudev_forminator_fixed_calculation_digits ) {
				return;
			}
			window.wpmudev_forminator_fixed_calculation_digits = {

				calculation_class : 	'forminator-calculation',
				holder_fields_prefix : 	'field_holder',
				cform_ajax_action : 	'forminator_load_cform',
				preparation_done : 		false,
				formatter : new Intl.NumberFormat('en-GB', {
											style: 'currency',
											currency: 'GBP',
										}),


				run: function() {
					// added custom country format
					if( window.wpmudev_country_format ){
						this.formatter = window.wpmudev_country_format;
					}
					// 1st hidde th calculation fields add a new text field 
					// that will hold their value with the currencty format
					//this.prepare_fields();
					$(d).ajaxComplete( function( event, xhr, settings ) {

						let action = wpmudev_forminator_fixed_calculation_digits.get_query_var( 'action', settings.data );
						
						if ( action === wpmudev_forminator_fixed_calculation_digits.cform_ajax_action ) {

							//setTimeout(function() {					
								wpmudev_forminator_fixed_calculation_digits.prepare_fields();
							//}, 100);
							
						}								

					});


					$( `.${this.calculation_class}` ).on( 'change', function(){

						if ( ! wpmudev_forminator_fixed_calculation_digits.preparation_done ) {
							return;
						}

						// Update the field holder value with formated value
						let field = $( this ),
							field_holder = field.parent().find( `#${wpmudev_forminator_fixed_calculation_digits.holder_fields_prefix}-${field.attr("id")}` );
						
						wpmudev_forminator_fixed_calculation_digits.set_field_val( field_holder, field.val() );	
					} );
				},


				prepare_fields: function() {

					if ( wpmudev_forminator_fixed_calculation_digits.preparation_done ) {
						return;
					}

					wpmudev_forminator_fixed_calculation_digits.preparation_done = true;

					$( `.${this.calculation_class}` ).each( function(){

						let field = $(this),
							field_holder = $( '<input />',{
								type : 	"text",
								id : 	`${wpmudev_forminator_fixed_calculation_digits.holder_fields_prefix}-${field.attr( "id" )}`,
								"class" : field.attr( 'class' ),
								"disabled" : "disabled"
							} );

						wpmudev_forminator_fixed_calculation_digits.set_field_val( field_holder, field.val() );
						field.css( 'display', 'none' );
						field.after( field_holder );

					});

				},

				set_field_val: function( field, value ){

					let formated_value = wpmudev_forminator_fixed_calculation_digits.formatter.format( value );
					field.val( formated_value );
						
				},

				get_query_var: function( name, url ) {
					if ( ! url ) {
						return false;
					}
					name = name.replace(/[\[\]]/g, "\\$&");
					var regex = new RegExp(name + "(=([^&#]*)|&|#|$)"),
						results = regex.exec(url);
					if (!results) return false;
					if (!results[2]) return false;
					return decodeURIComponent( results[2].replace(/\+/g, " ") );
				}
				
			};

			$(d).ready( function(){
				$(document).on( 'after.load.forminator',function( e, form_id ) {
					wpmudev_forminator_fixed_calculation_digits.run();
				});
			} );
		})(jQuery,document);

	</script>
	<?php

}, 21);