Vibe Coding · Aula

Armazenando dados de forma simples

Do armazenamento local a um banco de dados real.

Armazenando dados de forma simples é uma aula grátis de Vibe Coding no CoddyKit. Esta é a aula 3 de 4. Você pode ler a aula completa abaixo gratuitamente — depois pratica ao vivo no navegador com um editor de código integrado e um tutor de IA 24/7. Faz parte do caminho de aprendizado de Vibe Coding, e seu progresso é sincronizado entre a web e o app CoddyKit. O curso de Vibe Coding inclui 4 aulas no total.

Partes desta aula ainda não foram traduzidas e aparecem em inglês.

Data That Sticks Around

Most apps need to remember things: your to-do list, your saved notes, the dark-mode setting you chose. Without storage, everything disappears when you refresh the page.

The good news: you can go from 'remembers nothing' to 'remembers everything' just by describing what to save — AI handles the storage code.

The Storage Ladder

There are levels of storage, from simplest to most powerful. Start low and climb only when you need to:

In memory — fast but forgotten on refresh
Local storage — saved in the user's browser, survives refresh
A database — shared across devices and users, the real deal

Telling AI which rung you want keeps your app as simple as possible.

Saving to the Browser

The easiest persistent storage is localStorage — a little notebook the browser keeps for your app. It's perfect for settings and small lists on a single device.

You don't need a server or account for this. A prompt like the one below adds it instantly.

Make my to-do list save to the browser's
localStorage so my tasks are still there after I
refresh the page. Load them automatically when the
page opens.

How localStorage Works

localStorage stores text by a name (a 'key'). To save objects or lists, you turn them into JSON text first, then turn them back when reading.

Run this to see the pattern AI uses: save a value, then read it back.

const settings = { theme: 'dark', fontSize: 16 };

const saved = JSON.stringify(settings);
console.log('Saved text:', saved);

const loaded = JSON.parse(saved);
console.log('Theme is:', loaded.theme);

When localStorage Isn't Enough

localStorage only lives in one browser on one device. If you want users to see their data on their phone and laptop, or share data between users, you need a database on a server.

That sounds scary, but tools make it easy. You'll describe what to store, and AI sets up the database calls.

Easy Databases for Vibe Coders

You don't need to run your own server. Hosted databases give you storage with almost no setup:

Supabase — a friendly database with built-in login, great with AI tools
Firebase — Google's real-time database
Airtable — a spreadsheet that acts like a database

Builders like Bolt, Lovable and Replit can connect these for you when you ask.

Adding a Database by Prompt

To add real storage, describe what you're saving and where. Naming Supabase (a popular choice) tells AI exactly which setup to generate.

This prompt turns a local-only app into one with a shared, persistent database.

Connect this app to Supabase. Create a table called
notes with columns: id, title, content, and
created_at. Update the app so saving a note inserts
a row, and the homepage loads all notes from the
table, newest first.

Thinking in Tables

A database stores data in tables — like spreadsheets with named columns. A 'notes' table might have a title, content, and a date. Each saved note is one row.

You don't need to master database design. Just tell AI what fields each thing has, and it builds the table for you.

Create, Read, Update, Delete

Almost every data app does four things, nicknamed CRUD: Create new items, Read them back, Update them, and Delete them. If your app can do all four, it's a real tool.

You can ask AI to add them one at a time, testing each before moving on.

Add full editing to my notes app: I should be able
to create a note, edit an existing note's title and
content, and delete a note with a confirm dialog.
Keep everything saved to Supabase.

Start Simple, Upgrade Later

The pro move is to start at the lowest rung that works. Building a quick prototype? localStorage. Need it on every device? Move up to a database. AI can even migrate you — 'switch my app from localStorage to Supabase.'

Don't over-engineer early. Match the storage to what your app actually needs today.

My app currently uses localStorage. Migrate it to
use Supabase instead so my data syncs across
devices, and move any existing local data into the
database on first load.

Backups and Not Losing Data

Data is precious — users get upset if it vanishes. Hosted databases like Supabase and Firebase keep backups for you, which is another reason to graduate from localStorage for anything important.

You can also let users export their own data as a safety net. Ask AI to add a one-click backup so nobody loses their work.

Add a "Download backup" button that exports all my
notes from the database as a JSON file, and an
"Import backup" option that restores them. This
way users never lose their data.

Quick Check

You built a notes app that uses the browser's localStorage. A user complains they can't see their notes when they open the app on their phone. What kind of storage do they actually need?

Recap: Storing Data Simply

You learned the storage ladder: in-memory, then localStorage for single-device persistence, then a real database for cross-device, shared data.

You saw how to save settings in the browser, when to upgrade to hosted databases like Supabase, how data lives in tables, and the CRUD actions every data app needs. Start simple and let AI upgrade you. Next: keeping your API keys and secrets safe.

Perguntas Frequentes

A aula “Armazenando dados de forma simples” é grátis?

Sim — o texto completo de “Armazenando dados de forma simples” é grátis para ler aqui na web. Para praticá-la interativamente (um editor de código integrado e um tutor de IA 24/7) e desbloquear o restante do curso de Vibe Coding, atualize para CoddyKit PRO. O curso de Vibe Coding inclui 4 aulas no total.

O que vou aprender em “Armazenando dados de forma simples”?

Do armazenamento local a um banco de dados real. Você pratica Vibe Coding com código prático que executa diretamente no navegador, e um tutor de IA 24/7 responde suas dúvidas enquanto trabalha na aula.

Preciso ter experiência prévia para começar Vibe Coding?

Nenhuma experiência prévia é necessária. Vibe Coding no CoddyKit é estruturado para alunos iniciantes até avançados, então você pode começar aqui ou desde o início e aprender no seu ritmo. Esta é a aula 3 de 4.

Quanto tempo leva a aula “Armazenando dados de forma simples”?

A maioria das aulas CoddyKit leva cerca de 5–10 minutos. Cada uma é compacta e interativa, então você faz progresso constante e retoma exatamente de onde parou entre web e app.

Posso escrever e executar código nesta aula de Vibe Coding?

Sim. Cada aula de Vibe Coding inclui um editor de código integrado, então você escreve e executa código real direto no navegador e recebe feedback de IA instantaneamente — nenhuma configuração local necessária.

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