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+---
+title: 🟠 Avoid losing form data
+description: Challenge 48 is about Bob 🧙‍♂️ the product owner, he wants to develop a new feature in response to customer complaints about losing form input information.
+author: timothy-alcaide
+contributors:
+  - alcaidio
+  - svenson95
+challengeNumber: 48
+command: avoid-losing-form-data
+sidebar:
+  order: 121
+  badge: New
+---
+
+## Context
+
+As a member of the development team, you need to address a specific request from the product owner, 🧙‍♂️ Bob. He wants to develop a new feature in response to customer complaints about losing form input information.
+
+## User Story
+
+Here's the feature expressed as a user story (functional expectation) :
+
+"As a user, I would like to have an alert dialog box that appears when I attempt to navigate away from the /form page after I have started entering information into the form."
+
+## Acceptance Criteria
+
+1. On the /form page:
+
+- If the input text has been pre-filled, then an alert dialog box opens.
+- Otherwise, the user navigates normally.
+
+2. The content of `dialog.component.ts` must be use for your dialog box content.
+3. The appearance and behavior of the alert dialog box must comply with W3C conventions, see [alert dialog pattern](https://www.w3.org/WAI/ARIA/apg/patterns/alertdialog/).
+4. Maximize the use of the new concepts and syntax in the latest version of Angular.
+
+<details>
+    <summary>Tips 🤫 (if you really need it and after careful consideration)</summary>
+    <ul>
+    <li>Use the Material CDK Dialog or Overlay - https://material.angular.io/cdk/ (dont forget to add @import '@angular/cdk/overlay-prebuilt.css' in style.sccss)</li>
+    <li>Use the CanDeactivate guard - https://angular.io/api/router/CanDeactivate (use new functionnal approach).</li>
+    </ul>
+</details>