with-angular.mdx

title	description
Build a User Management App with Angular	Learn how to use Supabase in your Angular App.

If you get stuck while working through this guide, refer to the full example on GitHub.

Building the app

Let's start building the Angular app from scratch.

Initialize an Angular app

We can use the Angular CLI to initialize an app called supabase-angular:

npx ng new supabase-angular --routing false --style css --standalone false
cd supabase-angular

Then let's install the only additional dependency: supabase-js

npm install @supabase/supabase-js

And finally we want to save the environment variables in the src/environments/environment.ts file. All we need are the API URL and the key that you copied earlier. These variables will be exposed on the browser, and that's completely fine since we have Row Level Security enabled on our Database.

export const environment = {
  production: false,
  supabaseUrl: 'YOUR_SUPABASE_URL',
  supabaseKey: 'YOUR_SUPABASE_KEY',
}

Now that we have the API credentials in place, let's create a SupabaseService with ng g s supabase to initialize the Supabase client and implement functions to communicate with the Supabase API.

import { Injectable } from '@angular/core'
import {
  AuthChangeEvent,
  AuthSession,
  createClient,
  Session,
  SupabaseClient,
  User,
} from '@supabase/supabase-js'
import { environment } from '../environments/environment'

export interface Profile {
  id?: string
  username: string
  website: string
  avatar_url: string
}

@Injectable({
  providedIn: 'root',
})
export class SupabaseService {
  private supabase: SupabaseClient
  _session: AuthSession | null = null

  constructor() {
    this.supabase = createClient(environment.supabaseUrl, environment.supabaseKey)
  }

  get session() {
    this.supabase.auth.getSession().then(({ data }) => {
      this._session = data.session
    })
    return this._session
  }

  profile(user: User) {
    return this.supabase
      .from('profiles')
      .select(`username, website, avatar_url`)
      .eq('id', user.id)
      .single()
  }

  authChanges(callback: (event: AuthChangeEvent, session: Session | null) => void) {
    return this.supabase.auth.onAuthStateChange(callback)
  }

  signIn(email: string) {
    return this.supabase.auth.signInWithOtp({ email })
  }

  signOut() {
    return this.supabase.auth.signOut()
  }

  updateProfile(profile: Profile) {
    const update = {
      ...profile,
      updated_at: new Date(),
    }

    return this.supabase.from('profiles').upsert(update)
  }

  downLoadImage(path: string) {
    return this.supabase.storage.from('avatars').download(path)
  }

  uploadAvatar(filePath: string, file: File) {
    return this.supabase.storage.from('avatars').upload(filePath, file)
  }
}

Optionally, update src/styles.css to style the app.

Set up a login component

Let's set up an Angular component to manage logins and sign ups. We'll use Magic Links, so users can sign in with their email without using passwords. Create an AuthComponent with ng g c auth Angular CLI command.

import { Component } from '@angular/core'
import { FormBuilder } from '@angular/forms'
import { SupabaseService } from '../supabase.service'

@Component({
  selector: 'app-auth',
  templateUrl: './auth.component.html',
  styleUrls: ['./auth.component.css'],
})
export class AuthComponent {
  loading = false

  signInForm = this.formBuilder.group({
    email: '',
  })

  constructor(
    private readonly supabase: SupabaseService,
    private readonly formBuilder: FormBuilder
  ) {}

  async onSubmit(): Promise<void> {
    try {
      this.loading = true
      const email = this.signInForm.value.email as string
      const { error } = await this.supabase.signIn(email)
      if (error) throw error
      alert('Check your email for the login link!')
    } catch (error) {
      if (error instanceof Error) {
        alert(error.message)
      }
    } finally {
      this.signInForm.reset()
      this.loading = false
    }
  }
}

<div class="row flex-center flex">
  <div class="col-6 form-widget" aria-live="polite">
    <h1 class="header">Supabase + Angular</h1>
    <p class="description">Sign in via magic link with your email below</p>
    <form [formGroup]="signInForm" (ngSubmit)="onSubmit()" class="form-widget">
      <div>
        <label for="email">Email</label>
        <input
          id="email"
          formControlName="email"
          class="inputField"
          type="email"
          placeholder="Your email"
        />
      </div>
      <div>
        <button type="submit" class="button block" [disabled]="loading">
          {{ loading ? 'Loading' : 'Send magic link' }}
        </button>
      </div>
    </form>
  </div>
</div>

Account page

Users also need a way to edit their profile details and manage their accounts after signing in. Create an AccountComponent with the ng g c account Angular CLI command.

import { Component, Input, OnInit } from '@angular/core'
import { FormBuilder } from '@angular/forms'
import { AuthSession } from '@supabase/supabase-js'
import { Profile, SupabaseService } from '../supabase.service'

@Component({
  selector: 'app-account',
  templateUrl: './account.component.html',
  styleUrls: ['./account.component.css'],
})
export class AccountComponent implements OnInit {
  loading = false
  profile!: Profile

  @Input()
  session!: AuthSession

  updateProfileForm = this.formBuilder.group({
    username: '',
    website: '',
    avatar_url: '',
  })

  constructor(
    private readonly supabase: SupabaseService,
    private formBuilder: FormBuilder
  ) {}

  async ngOnInit(): Promise<void> {
    await this.getProfile()

    const { username, website, avatar_url } = this.profile
    this.updateProfileForm.patchValue({
      username,
      website,
      avatar_url,
    })
  }

  async getProfile() {
    try {
      this.loading = true
      const { user } = this.session
      const { data: profile, error, status } = await this.supabase.profile(user)

      if (error && status !== 406) {
        throw error
      }

      if (profile) {
        this.profile = profile
      }
    } catch (error) {
      if (error instanceof Error) {
        alert(error.message)
      }
    } finally {
      this.loading = false
    }
  }

  async updateProfile(): Promise<void> {
    try {
      this.loading = true
      const { user } = this.session

      const username = this.updateProfileForm.value.username as string
      const website = this.updateProfileForm.value.website as string
      const avatar_url = this.updateProfileForm.value.avatar_url as string

      const { error } = await this.supabase.updateProfile({
        id: user.id,
        username,
        website,
        avatar_url,
      })
      if (error) throw error
    } catch (error) {
      if (error instanceof Error) {
        alert(error.message)
      }
    } finally {
      this.loading = false
    }
  }

  async signOut() {
    await this.supabase.signOut()
  }
}

<form [formGroup]="updateProfileForm" (ngSubmit)="updateProfile()" class="form-widget">
  <div>
    <label for="email">Email</label>
    <input id="email" type="text" [value]="session.user.email" disabled />
  </div>
  <div>
    <label for="username">Name</label>
    <input formControlName="username" id="username" type="text" />
  </div>
  <div>
    <label for="website">Website</label>
    <input formControlName="website" id="website" type="url" />
  </div>

  <div>
    <button type="submit" class="button primary block" [disabled]="loading">
      {{ loading ? 'Loading ...' : 'Update' }}
    </button>
  </div>

  <div>
    <button class="button block" (click)="signOut()">Sign Out</button>
  </div>
</form>

Launch!

Now that we have all the components in place, let's update AppComponent:

import { Component, OnInit } from '@angular/core'
import { SupabaseService } from './supabase.service'

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent implements OnInit {
  title = 'angular-user-management'

  session = this.supabase.session

  constructor(private readonly supabase: SupabaseService) {}

  ngOnInit() {
    this.supabase.authChanges((_, session) => (this.session = session))
  }
}

<div class="container" style="padding: 50px 0 100px 0">
  <app-account *ngIf="session; else auth" [session]="session"></app-account>
  <ng-template #auth>
    <app-auth></app-auth>
  </ng-template>
</div>

app.module.ts also needs to be modified to include the ReactiveFormsModule from the @angular/forms package.

import { NgModule } from '@angular/core'
import { BrowserModule } from '@angular/platform-browser'

import { AppComponent } from './app.component'
import { AuthComponent } from './auth/auth.component'
import { AccountComponent } from './account/account.component'
import { ReactiveFormsModule } from '@angular/forms'
import { AvatarComponent } from './avatar/avatar.component'

@NgModule({
  declarations: [AppComponent, AuthComponent, AccountComponent, AvatarComponent],
  imports: [BrowserModule, ReactiveFormsModule],
  providers: [],
  bootstrap: [AppComponent],
})
export class AppModule {}

Once that's done, run this in a terminal window:

npm run start

And then open the browser to localhost:4200 and you should see the completed app.

Bonus: Profile photos

Every Supabase project is configured with Storage for managing large files like photos and videos.

Create an upload widget

Let's create an avatar for the user so that they can upload a profile photo. Create an AvatarComponent with ng g c avatar Angular CLI command.

import { Component, EventEmitter, Input, Output } from '@angular/core'
import { SafeResourceUrl, DomSanitizer } from '@angular/platform-browser'
import { SupabaseService } from '../supabase.service'

@Component({
  selector: 'app-avatar',
  templateUrl: './avatar.component.html',
  styleUrls: ['./avatar.component.css'],
})
export class AvatarComponent {
  _avatarUrl: SafeResourceUrl | undefined
  uploading = false

  @Input()
  set avatarUrl(url: string | null) {
    if (url) {
      this.downloadImage(url)
    }
  }

  @Output() upload = new EventEmitter<string>()

  constructor(
    private readonly supabase: SupabaseService,
    private readonly dom: DomSanitizer
  ) {}

  async downloadImage(path: string) {
    try {
      const { data } = await this.supabase.downLoadImage(path)
      if (data instanceof Blob) {
        this._avatarUrl = this.dom.bypassSecurityTrustResourceUrl(URL.createObjectURL(data))
      }
    } catch (error) {
      if (error instanceof Error) {
        console.error('Error downloading image: ', error.message)
      }
    }
  }

  async uploadAvatar(event: any) {
    try {
      this.uploading = true
      if (!event.target.files || event.target.files.length === 0) {
        throw new Error('You must select an image to upload.')
      }

      const file = event.target.files[0]
      const fileExt = file.name.split('.').pop()
      const filePath = `${Math.random()}.${fileExt}`

      await this.supabase.uploadAvatar(filePath, file)
      this.upload.emit(filePath)
    } catch (error) {
      if (error instanceof Error) {
        alert(error.message)
      }
    } finally {
      this.uploading = false
    }
  }
}

<div>
  <img
    *ngIf="_avatarUrl"
    [src]="_avatarUrl"
    alt="Avatar"
    class="avatar image"
    style="height: 150px; width: 150px"
  />
</div>
<div *ngIf="!_avatarUrl" class="avatar no-image" style="height: 150px; width: 150px"></div>
<div style="width: 150px">
  <label class="button primary block" for="single">
    {{ uploading ? 'Uploading ...' : 'Upload' }}
  </label>
  <input
    style="visibility: hidden;position: absolute"
    type="file"
    id="single"
    accept="image/*"
    (change)="uploadAvatar($event)"
    [disabled]="uploading"
  />
</div>

Add the new widget

And then we can add the widget on top of the AccountComponent HTML template:

<form [formGroup]="updateProfileForm" (ngSubmit)="updateProfile()" class="form-widget">
  <app-avatar [avatarUrl]="this.avatarUrl" (upload)="updateAvatar($event)"> </app-avatar>
  <!-- input fields -->
</form>

And add an updateAvatar function along with an avatarUrl getter to the AccountComponent typescript file:

@Component({
  selector: 'app-account',
  templateUrl: './account.component.html',
  styleUrls: ['./account.component.css'],
})
export class AccountComponent implements OnInit {
  // ...
  get avatarUrl() {
    return this.updateProfileForm.value.avatar_url as string
  }

  async updateAvatar(event: string): Promise<void> {
    this.updateProfileForm.patchValue({
      avatar_url: event,
    })
    await this.updateProfile()
  }
  // ...
}

At this stage you have a fully functional application!