From a780c9ce7d7fedb93012e7270059f8daeead384c Mon Sep 17 00:00:00 2001
From: AshGDS <8880610+AshGDS@users.noreply.github.com>
Date: Thu, 26 Oct 2023 16:12:02 +0100
Subject: [PATCH] Fix bug when forms with data-ga4-form-no-answer-undefined are
 submitted

When data-ga4-form-no-answer-undefined exists, it sets the text to undefined. However straight after that, it was trying to call .toLowerCase(), so the GA4 JS crashes on submit of these search forms.
---
 .../analytics-ga4/ga4-form-tracker.js                           | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/assets/javascripts/govuk_publishing_components/analytics-ga4/ga4-form-tracker.js b/app/assets/javascripts/govuk_publishing_components/analytics-ga4/ga4-form-tracker.js
index 091f76c757..c52b1a6b40 100644
--- a/app/assets/javascripts/govuk_publishing_components/analytics-ga4/ga4-form-tracker.js
+++ b/app/assets/javascripts/govuk_publishing_components/analytics-ga4/ga4-form-tracker.js
@@ -46,7 +46,7 @@ window.GOVUK.Modules = window.GOVUK.Modules || {};
       var formData = this.getInputValues(formInputs)
       data.text = data.text || this.combineGivenAnswers(formData) || this.useFallbackValue
 
-      if (data.action === 'search') {
+      if (data.action === 'search' && data.text) {
         data.text = data.text.toLowerCase()
         data.text = window.GOVUK.analyticsGa4.core.trackFunctions.removeLinesAndExtraSpaces(data.text)
       }