Why Supabase is the open-source Firebase alternative - Visual Breakdown

Process Flow - Why Supabase is the open-source Firebase alternative

Start: Need backend for app

↓

Choose Firebase?

No→Choose Supabase

Yes↓

Firebase: Proprietary, closed source

↓

Supabase: Open-source, Postgres-based

↓

Supabase provides Realtime DB, Auth, Storage

↓

Developers build apps with Supabase backend

↓

Community contributes to Supabase code

↓

More features and transparency

↓

End: Open-source Firebase alternative

This flow shows the decision and benefits of choosing Supabase as an open-source alternative to Firebase for app backend needs.

Execution Sample

Supabase

import { createClient } from '@supabase/supabase-js';

const supabase = createClient('https://xyz.supabase.co', 'public-anon-key');

const { data, error } = await supabase.from('todos').select('*');

This code connects to Supabase and fetches all rows from the 'todos' table.

Process Table

Step	Action	Input/Query	Supabase Response	Result
1	Initialize client	URL and anon key	Client object created	Ready to query
2	Send query	Select all from 'todos'	Returns list of todos	Data received
3	Check error	Error object	null (no error)	Proceed with data
4	Use data	Data array	Array of todo items	Display or process todos
5	End	No more queries	N/A	App backend working with Supabase

💡 All steps completed successfully, data fetched from Supabase database.

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	Final
supabase	undefined	Client object	Client object	Client object	Client object
data	undefined	undefined	Array of todos	Array of todos	Array of todos
error	undefined	undefined	null	null	null

Key Moments - 3 Insights

Why do we need to check the 'error' after querying?

Because the query might fail due to network or permission issues. Checking 'error' (see step 3 in execution_table) ensures we only use valid data.

What makes Supabase different from Firebase in terms of source code?

Supabase is open-source, meaning anyone can see and contribute to its code, unlike Firebase which is closed-source. This is shown in the concept_flow where Supabase encourages community contributions.

How does Supabase provide realtime features?

Supabase uses Postgres with realtime subscriptions, allowing apps to listen to database changes instantly. This is part of the 'Supabase provides Realtime DB' step in the concept_flow.

Visual Quiz - 3 Questions

Look at the execution_table, what is the value of 'error' after Step 3?

A undefined

B null

C An error message string

D An empty array

💡 Hint

Check the 'error' column in row for Step 3 in execution_table.

At which step does the Supabase client get created?

A Step 2

B Step 3

C Step 1

D Step 4

💡 Hint

Look at the 'Action' column in execution_table for client initialization.

If the query returned an error, what would change in the execution_table?

A 'error' would contain error details

B 'data' would be an array

C 'error' would be null

D Client object would be undefined

💡 Hint

Refer to the 'Supabase Response' and 'Result' columns in execution_table Step 3.

Concept Snapshot

Supabase is an open-source backend platform like Firebase.
It uses Postgres for database and supports realtime updates.
Developers connect using a client with URL and anon key.
Queries return data and error objects to handle results.
Open-source means community can contribute and inspect code.
Ideal for apps needing transparent, flexible backend services.

Full Transcript

Supabase is a backend platform that developers use to build apps. It is open-source, unlike Firebase which is closed-source. This means anyone can see and improve Supabase's code. Developers start by creating a client with a URL and a public key. Then they send queries to the database, like selecting all items from a table. Supabase responds with data and an error object. If there is no error, the app uses the data. Supabase also supports realtime updates and storage. This makes it a powerful and transparent alternative to Firebase for app backends.