fix: replace recaptcha alerts with generic errors

src/other-scripts/recaptcha/index.js

@@ -80,6 +80,39 @@ function addHiddenField( form ) {
 	}
 }
 
+/**
+ * Append a generic error message above the given form.
+ *
+ * @param {HTMLElement} form    The form element.
+ * @param {string}      message The error message to display.
+ */
+function addErrorMessage( form, message ) {
+	const errorText = document.createElement( 'p' );
+	errorText.textContent = message;
+	const container = document.createElement( 'div' );
+	container.classList.add( 'newspack-recaptcha-error' );
+	container.appendChild( errorText );
+	// Newsletters block errors render below the form.
+	if ( form.parentElement.classList.contains( 'newspack-newsletters-subscribe' ) ) {
+		form.append( container );
+	} else {
+		container.classList.add( 'newspack-ui__notice', 'newspack-ui__notice--error' );
+		form.insertBefore( container, form.firstChild );
+	}
+}
+
+/**
+ * Remove generic error messages from form if present.
+ *
+ * @param {HTMLElement} form The form element.
+ */
+function removeErrorMessages( form ) {
+	const errors = form.querySelectorAll( '.newspack-recaptcha-error' );
+	for ( const error of errors ) {
+		error.parentElement.removeChild( error );
+	}
+}
+
 /**
  * Remove the hidden reCAPTCHA v3 token field from the given form.
  *
@@ -147,6 +180,14 @@ function renderWidget( form, onSuccess = null, onError = null ) {
 			refreshWidget( button );
 		};
 
+		const errorCallback = ( message ) => {
+			if ( onError ) {
+				onError( message );
+			} else {
+				addErrorMessage( form, message );
+			}
+		}
+
 		// Render reCAPTCHA widget. See https://developers.google.com/recaptcha/docs/invisible#js_api for API reference.
 		const widgetId = grecaptcha.render( button, {
 			...options,
@@ -158,17 +199,12 @@ function renderWidget( form, onSuccess = null, onError = null ) {
 					refreshWidget( button );
 				} else {
 					clearInterval( refreshIntervalId );
+					button.disabled = true;
 				}
 				const message = retryCount < 3
 					? wp.i18n.__( 'There was an error with reCAPTCHA. Please try again.', 'newspack-plugin' )
 					: wp.i18n.__( 'There was an error with reCAPTCHA. Please reload the page and try again.', 'newspack-plugin' );
-				if ( onError ) {
-					onError( message );
-				} else {
-					// Recaptcha's default error behavior is to alert with the above message.
-					// eslint-disable-next-line no-alert
-					alert( message );
-				}
+				errorCallback( message );
 			},
 		} );
 
@@ -177,6 +213,8 @@ function renderWidget( form, onSuccess = null, onError = null ) {
 
 		button.addEventListener( 'click', e => {
 			e.preventDefault();
+			// Empty error messages if present.
+			removeErrorMessages( form );
 			// Skip reCAPTCHA verification if the button has a data-skip-recaptcha attribute.
 			if ( button.hasAttribute( 'data-skip-recaptcha' ) ) {
 				successCallback();

src/other-scripts/recaptcha/style.scss

@@ -13,3 +13,9 @@
 	inset: 0 !important; // Prevents an odd side-scroll issue in the registration modal & block.
 	visibility: hidden !important;
 }
+
+.newspack-recaptcha-error {
+	&.newspack-ui__notice--error {
+		margin-top: 0 !important;
+	}
+}