From 0943e340a659ca47951d780952390b5a85dc0a1a Mon Sep 17 00:00:00 2001
From: Andrew Telnov <andrew.telnov@gmail.com>
Date: Mon, 11 Dec 2023 16:21:53 +0200
Subject: [PATCH] Specialized Components - A Text question's placeholder is not
 updated when changing a survey's locale fix #7480

---
 src/question_custom.ts        | 10 ++++++++--
 tests/question_customtests.ts | 20 ++++++++++++++++++++
 2 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/question_custom.ts b/src/question_custom.ts
index 7948ae6684..09575844c6 100644
--- a/src/question_custom.ts
+++ b/src/question_custom.ts
@@ -414,8 +414,14 @@ export abstract class QuestionCustomModelBase extends Question
       this.getElement().locStrsChanged();
     }
   }
-  protected createWrapper() { }
-  protected onPropertyValueChanged(name: string, oldValue: any, newValue: any) {
+  public localeChanged(): void {
+    super.locStrsChanged();
+    if(!!this.getElement()) {
+      this.getElement().localeChanged();
+    }
+  }
+  protected createWrapper(): void { }
+  protected onPropertyValueChanged(name: string, oldValue: any, newValue: any): void {
     super.onPropertyValueChanged(name, oldValue, newValue);
     if (!!this.customQuestion && !this.isLoadingFromJson) {
       this.customQuestion.onPropertyChanged(this, name, newValue);
diff --git a/tests/question_customtests.ts b/tests/question_customtests.ts
index a26bef7fc6..039c45cb4c 100644
--- a/tests/question_customtests.ts
+++ b/tests/question_customtests.ts
@@ -2545,3 +2545,23 @@ QUnit.test("Allow to add question via addNewQuestion for component, but not for
   assert.notOk(q3, "matrixdropdownbase is not created");
   ComponentCollection.Instance.clear();
 });
+QUnit.test("text placeholder is not updated on changing locale", function (assert) {
+  ComponentCollection.Instance.add({
+    name: "customtext",
+    questionJSON: {
+      type: "text",
+      placeholder: { en: "en-TextPH", de: "de-TextPH" },
+    },
+  });
+  const survey = new SurveyModel({
+    elements: [
+      { type: "customtext", name: "q1" }
+    ]
+  });
+  const q1 = <QuestionCustomModel>survey.getQuestionByName("q1");
+  const contentQuestion = <QuestionTextModel>q1.contentQuestion;
+  assert.equal(contentQuestion.renderedPlaceholder, "en-TextPH", "en placeholder");
+  survey.locale = "de";
+  assert.equal(contentQuestion.renderedPlaceholder, "de-TextPH", "de placeholder");
+  ComponentCollection.Instance.clear();
+});