What Skills Do You Need to Become a Full Stack Developer?

<style>
  .grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
  }
  .card { border: 1px solid #ddd; border-radius: 8px; padding: 12px; }
</style>

<section class="grid">
  <article class="card"><h3>Notebook</h3><p>Rs 50</p></article>
  <article class="card"><h3>Pen</h3><p>Rs 10</p></article>
  <article class="card"><h3>Bag</h3><p>Rs 799</p></article>
</section>

const input = document.querySelector("#search");
const list = document.querySelector("#results");

input.addEventListener("input", async () => {
  const q = encodeURIComponent(input.value.trim());
  if (!q) { list.innerHTML = ""; return; }
  try {
    const res = await fetch(`/api/products?q=${q}`);
    if (!res.ok) throw new Error(res.status);
    const items = await res.json();
    list.innerHTML = items.map((p) => `<li>${p.name}</li>`).join("");
  } catch (e) {
    list.innerHTML = "<li>Could not load results</li>";
  }
});

from flask import Flask, jsonify, request
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:///tasks.db"
db = SQLAlchemy(app)

class Task(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(120), nullable=False)
    done = db.Column(db.Boolean, default=False)

@app.post("/api/tasks")
def create_task():
    data = request.get_json() or {}
    if not data.get("title"):
        return jsonify(error="title is required"), 400
    task = Task(title=data["title"])
    db.session.add(task)
    db.session.commit()
    return jsonify(id=task.id, title=task.title, done=task.done), 201

with app.app_context():
    db.create_all()

from werkzeug.security import generate_password_hash, check_password_hash

stored = generate_password_hash("Secret@123")   # save this, never the raw password
print(stored[:20], "...")

print(check_password_hash(stored, "Secret@123"))  # True
print(check_password_hash(stored, "wrong"))       # False

import pytest
from tasks_api import app, db

@pytest.fixture
def client():
    app.config.update(TESTING=True, SQLALCHEMY_DATABASE_URI="sqlite:///:memory:")
    with app.app_context():
        db.create_all()
    return app.test_client()

def test_create_task(client):
    r = client.post("/api/tasks", json={"title": "Learn Git"})
    assert r.status_code == 201
    assert r.get_json()["title"] == "Learn Git"

def test_missing_title_returns_400(client):
    assert client.post("/api/tasks", json={}).status_code == 400

FROM python:3.12-slim
WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
ENV FLASK_APP=tasks_api.py
CMD ["flask", "run", "--host=0.0.0.0", "--port=8000"]

Stage 1  HTML + CSS (responsive layouts)
Stage 2  JavaScript (DOM, events, async, fetch)
Stage 3  Git + GitHub
Stage 4  Backend framework + REST APIs
Stage 5  SQL + one database + ORM
Stage 6  Authentication + security basics
Stage 7  One frontend framework (e.g. React)
Stage 8  Testing + deployment (Docker, hosting)
Milestone projects after stages 2, 5 and 8.

Milestone 1: Interactive app (JS + public API)
Milestone 2: REST API with a database (CRUD + tests)
Milestone 3: Full stack app with login, deployed online
Each with: README, live link, screenshots,
"what I would improve next"

Rate 1-5 and focus on the lowest two:
HTML/CSS           __
JavaScript         __
Framework          __
Backend + APIs     __
SQL + modelling    __
Auth + security    __
Git + testing      __
Deployment         __