👀 Views: 0 💬 Answers: 1 📅 Created: 2025-06-16

angular reactive-forms routing guards TypeScript

I'm building a feature where I'm dealing with I've been banging my head against this for hours... I'm sure I'm missing something obvious here, but I'm facing an issue with my Angular 15 application where I need to preserve the state of a reactive form when navigating between routes that use guards. I've set up a basic guard that checks if a user is allowed to navigate away based on some form conditions, but it seems that every time the guard permits navigation, the form is being reinitialized. This leads to the loss of any unsaved changes. Here's a simplified version of my guard: ```typescript import { Injectable } from '@angular/core'; import { CanDeactivate } from '@angular/router'; import { MyComponent } from './my-component.component'; @Injectable({ providedIn: 'root' }) export class CanDeactivateGuard implements CanDeactivate<MyComponent> { canDeactivate(component: MyComponent): boolean { return component.canDeactivate(); } } ``` And in my component, I have a reactive form set up like this: ```typescript import { Component, OnInit } from '@angular/core'; import { FormBuilder, FormGroup } from '@angular/forms'; @Component({ selector: 'app-my-component', templateUrl: './my-component.component.html', }) export class MyComponent implements OnInit { myForm: FormGroup; constructor(private fb: FormBuilder) {} ngOnInit() { this.myForm = this.fb.group({ name: [''], email: [''], }); } canDeactivate(): boolean { // Check if the form is dirty return this.myForm.dirty ? confirm('You have unsaved changes!') : true; } } ``` Despite using `CanDeactivate`, every time I navigate to a different route, the `myForm` is reset. I've tried to keep the form state in a service, but it still doesn't work as expected. I’m storing the form data in a service like this: ```typescript @Injectable({ providedIn: 'root' }) export class FormStateService { private formData: any = {}; setFormData(data: any) { this.formData = data; } getFormData() { return this.formData; } } ``` However, on route change, I’m not able to reinitialize the form with that data. Am I missing something in the lifecycle management of my component or the service? Any guidance on how to maintain the form's state during navigation would be greatly appreciated! This is part of a larger web app I'm building. Any ideas what could be causing this? For context: I'm using Typescript on Ubuntu. My development environment is Debian. Thanks, I really appreciate it! What am I doing wrong?