plugin install

wp/wp-content/plugins/gravityforms/js/datepicker-legacy.js

@@ -0,0 +1,43 @@
+/**
+ * Apply legacy options to DatePickers within Legacy Forms.
+ */
+gform.addFilter( 'gform_datepicker_options_pre_init', function( optionsObj, formId, inputId, $element ) {
+	var gf_legacy = window.gf_legacy_multi;
+
+	if ( ! gf_legacy ) {
+		return optionsObj;
+	}
+	if ( !gf_legacy[ formId ] || gf_legacy[ formId ] !== '1' ) {
+		return optionsObj;
+	}
+
+	var $ = window.jQuery;
+	var isPreview = $( '#preview_form_container' ).length > 0;
+	var isRTL = window.getComputedStyle( $element[ 0 ], null ).getPropertyValue( 'direction' ) === 'rtl';
+	var overrides = {
+		showOtherMonths: false,
+		beforeShow: function( input, inst ) {
+			inst.dpDiv[0].classList.remove( 'gform-theme-datepicker' );
+			inst.dpDiv[0].classList.remove( 'gravity-theme' );
+			inst.dpDiv[0].classList.remove( 'gform-theme' );
+			inst.dpDiv[0].classList.remove( 'gform-legacy-datepicker' );
+			inst.dpDiv[0].classList.remove( 'gform-theme--framework' );
+			inst.dpDiv[0].classList.remove( 'gform-theme--foundation' );
+			inst.dpDiv[0].classList.remove( 'gform-theme--orbital' );
+			inst.dpDiv[0].classList.add( 'gform-legacy-datepicker' );
+
+			if ( isRTL && isPreview ) {
+				var $inputContainer = $( input ).closest( '.gfield' );
+				var rightOffset = $( document ).outerWidth() - ( $inputContainer.offset().left + $inputContainer.outerWidth() );
+				inst.dpDiv[ 0 ].style.right = rightOffset + 'px';
+			}
+
+			if ( isPreview ) {
+				inst.dpDiv[0].classList.add( 'gform-preview-datepicker' );
+			}
+			return ! this.suppressDatePicker;
+		}
+	};
+
+	return Object.assign( optionsObj, overrides );
+}, -10 );