DEV Community: 3a5abi 🥷

Prime Day Tech Deals 2026: What's Actually Worth It

3a5abi 🥷 — Tue, 11 Aug 2026 18:02:35 +0000

Originally published on BytePlaza. Heads up: the product links below are Amazon affiliate links — if you buy through them, we may earn a small commission at no extra cost to you.

Every Prime Day, the same thing happens: a wall of "70% OFF" badges, countdown timers, and strikethrough prices that were never real to begin with. Some of the deals are excellent. Most are noise. The difference between the two comes down to a few minutes of verification — and knowing which product categories actually get discounted this time of year.

Here's how to tell the real deals from the theater, and the picks that survive the price-history test in 2026.

How to Spot Real vs. Fake Deals

Before you add anything to your cart, run it through three checks.

1. Check the price history, not the strikethrough

Amazon's "list price" is marketing, not history. Drop the product into CamelCamelCamel or Keepa and look at the 12-month low. If today's "deal" price is roughly where the product has been sitting for months, you're not saving anything — you're just being told you are.

2. Watch for the pre-event markup

A classic pattern: the price quietly climbs 10–15% in the weeks before the sale, then "drops" 25% on the day. Net savings: almost nothing. A price-history chart makes this instantly visible — a spike right before the event followed by a dramatic-looking cut is the tell.

3. Verify the seller and the exact model

Confirm the listing says "Ships from and sold by Amazon" — third-party sellers piggyback on popular listings during high-traffic events. And check the exact model number, especially for storage and audio products, where near-identical SKUs (older generations, lower-spec variants, regional models) get mixed into search results at "deal" prices.

As a rule of thumb: genuine Prime Day pricing typically lands 20–35% below the 90-day average for mature product categories. If the discount against the real average is thinner than that, it can probably wait.

Categories Where the Discounts Are Real

Some categories reliably see legitimate cuts during Prime Day:

Amazon's own hardware — Kindles, Fire tablets, and Echo devices hit their yearly lows here. Amazon controls the pricing, so there's no markup game.
Flagship headphones and earbuds — last-gen and current flagships from major brands see real, verifiable drops.
Storage — SSDs and microSD cards are consistently among the best-value buys of the event.
Charging accessories from established brands — power banks, GaN chargers, and cables from names like Anker discount for real.

Categories to Skip

Just as important is what not to buy:

TVs — Black Friday is still the better event for televisions, both on price and on model selection.
Laptops — many "deal" laptops are configurations built specifically to hit a sale price point: last-gen CPUs, slow storage, dim panels. Compare specs line-by-line before assuming a discount.
Robot vacuums — the category is oversaturated with sub-brands and inflated list prices. The strikethroughs here are the least trustworthy on the site.

Five Picks That Pass the Test

These are the deals that held up against price history this year:

Product	Deal Price
Apple AirPods Pro 2 (USB-C)	$263.86
Kindle Paperwhite (12th gen)	$159.99
Samsung T7 Shield 2TB SSD	$429.99
Anker 737 Power Bank	$104.99
Sony WH-1000XM5	$310.95

Apple AirPods Pro 2 (USB-C) — $263.86. Apple gear rarely discounts meaningfully; this is one of the few windows where it does.
Kindle Paperwhite (12th gen) — $159.99. Amazon hardware at an event low — the safest buy on this list.
Samsung T7 Shield 2TB SSD — $429.99. Portable, rugged, and a genuine drop in a category where Prime Day pricing is consistently honest.
Anker 737 Power Bank — $104.99. Established charging brand, real discount, and the kind of accessory that never goes on sale otherwise.
Sony WH-1000XM5 — $310.95. Still the benchmark for noise-cancelling over-ears, at a price well below its 90-day average.

The Bottom Line

Prime Day rewards people who do 60 seconds of homework. Check the price history, ignore the strikethrough, confirm the seller and model number, and stick to the categories where discounts are historically real. Everything else — the TVs, the mystery-brand robot vacuums, the "gaming" laptops built for a price tag — can wait for Black Friday, or forever.

What's the best (or worst) "deal" you've caught this Prime Day? Drop it in the comments.

I Connected Claude to SendGrid — Now I Send Email Campaigns by Just Asking

3a5abi 🥷 — Thu, 06 Aug 2026 17:42:19 +0000

TL;DR: I gave Claude direct access to SendGrid. Now I create and send full email campaigns with a single plain-English request — no code, no drag-and-drop builder. Full video walkthrough below. ⬇️

Email campaign tools haven't fundamentally changed in a decade:

It works, but it's slow — and it's exactly the kind of workflow AI assistants are starting to collapse into a single sentence.

My workflow now looks like this:

💬 "Draft a re-engagement email for subscribers who haven't opened anything in 30 days, keep the tone friendly, and send it."

That's it. Claude writes the email, builds the campaign in SendGrid, and sends it.

⚙️ How It Works

The connection gives Claude direct access to SendGrid's capabilities — so instead of you clicking through SendGrid's UI, Claude calls it on your behalf.

The setup has three parts:

1. Get your SendGrid API key 🔑
Generated in your SendGrid account settings — this is what authorizes Claude to act on your account.

2. Connect SendGrid to Claude 🔌
Add the integration so Claude can see and use SendGrid's tools.

3. Just ask ✨
Campaign creation, audience targeting, and sending — all through plain-English requests.

🎥 Full Step-by-Step Walkthrough

I recorded the entire setup from start to finish, including the parts that tripped me up the first time:

🤯 What Surprised Me

Before	After
Build segments by hand in the UI	Describe the audience in plain English
~1 hour per campaign	~2 minutes of conversation
Revise in the drag-and-drop builder	"Make the subject line punchier"

Segmentation from plain English is the part that feels genuinely new — describing an audience and having it translated into actual targeting.

The iteration loop is the sleeper feature. "Add a PS with the discount code" beats re-opening a builder every single time.

🔮 Where This Is Going

Email is just one surface. The same pattern — AI assistant + direct tool access — is showing up across the entire marketing stack. The teams that learn to work this way early will move noticeably faster than the ones still clicking through dashboards.

💬 Let's Talk

If you set this up and hit a snag, drop a comment — a couple of the connection steps are unintuitive the first time, and I'm happy to help debug.

What else have you connected an AI assistant to? I'm collecting ideas for the next walkthrough. 👇

Artificial General Intelligence: The Future of AI for Developers

3a5abi 🥷 — Wed, 25 Sep 2024 22:53:10 +0000

Introduction to Artificial General Intelligence (AGI)

Artificial General Intelligence (AGI) represents the pinnacle of AI development, aiming to mimic human cognitive abilities across diverse tasks. While today’s AI systems excel in specialized tasks, AGI envisions a machine that can think, learn, and solve problems across multiple domains autonomously. As a tech enthusiast or developer, understanding AGI is essential for keeping pace with future technological trends and breakthroughs.

In this blog, we’ll dive deep into the concept of AGI, its current state, and what it means for the future of AI development.

What is Artificial General Intelligence (AGI)?

Artificial General Intelligence, often referred to as “strong AI” or “full AI,” refers to AI systems capable of performing any intellectual task that a human can do. Unlike narrow AI, which focuses on specific tasks (like facial recognition or language translation), AGI is designed to exhibit general intelligence that can apply to a wide range of functions.

Key Characteristics of AGI:

Versatility: Capable of handling a wide variety of tasks across different domains.
Adaptability: Learns from experience and adapts to new situations like humans.
Autonomy: Requires minimal human intervention and can solve complex problems independently.

The Current State of AGI Development

While the idea of AGI has been around for decades, we’re still far from achieving it. Most AI systems today are narrow AI, excelling at specialized tasks like chess, image classification, or predictive analytics. Research in AGI focuses on creating systems that can integrate knowledge across fields, understand context, and adapt to new environments.

AGI vs. Narrow AI:

Narrow AI: Optimized for a single domain, such as DeepMind’s AlphaGo mastering Go or OpenAI’s GPT models generating human-like text.
AGI: Aims to transcend specific domains, working effectively in any environment, and applying generalized learning techniques. Challenges in Achieving AGI

Developing AGI is no small feat. The complexities of human cognition and decision-making processes are hard to replicate in machines. Here are some of the primary challenges developers and AI researchers face in AGI development:

1. Computational Complexity

AGI requires vast amounts of data processing, memory, and computational power. Current AI systems, even the most advanced, are limited by hardware constraints. AGI demands not only more powerful processors but also highly efficient algorithms that can simulate human thinking.

2. Lack of Common Sense Reasoning

Today’s AI lacks the ability to understand context and apply common sense reasoning. For AGI to work effectively, it needs to interpret abstract ideas, infer information from limited data, and make decisions based on incomplete or ambiguous information.

3. Ethics and Safety

As AGI develops, ethical considerations become paramount. How do we ensure AGI systems make decisions in a way that benefits humanity? There are also concerns about AGI’s potential impact on jobs, security, and privacy.

🧐 Read the full story here! ===> DevToys.io

Comparing the Top Mini PCs in Our New Collection

3a5abi 🥷 — Sun, 01 Sep 2024 18:55:55 +0000

Mini PCs have revolutionized the way we think about computing, offering high performance in a compact form factor. Whether you’re a professional looking for a powerful workstation, a gamer needing a portable gaming rig, or someone seeking a versatile home office solution, the Mini PCs in our collection cater to a variety of needs. We’ll compare some of the top Mini PCs available at BytePlaza, highlighting their key features, strengths, and ideal use cases.

1. GMKtec G3 – 12th Gen Alder Lake N100 Mini PC

Specifications:

Processor: 12th Gen Alder Lake N100
RAM: 16GB DDR4
Storage: 512GB NVMe SSD
Operating System: Windows 11 Pro
Connectivity: WiFi 6, Bluetooth 5.2

Overview: The GMKtec G3 is designed for users who need reliable performance for everyday computing tasks. Its 12th Gen Alder Lake N100 processor, coupled with 16GB of DDR4 RAM, makes it suitable for multitasking, office applications, and light content creation. The inclusion of WiFi 6 and Bluetooth 5.2 ensures fast and stable wireless connections, while the NVMe SSD provides quick boot times and ample storage.

Best For: Home offices, casual users, and those seeking a balanced mix of performance and value.

2. GMKtec M6 – AMD R5 6600H Mini PC

Specifications:

Processor: AMD R5 6600H (6 Core, 12 Thread)
RAM: 16GB DDR5
Storage: 512GB PCIe 3.0 SSD
Operating System: Windows 11 Pro
Connectivity: WiFi 6, Bluetooth 5.2

Overview: The GMKtec M6 is a powerhouse in a small package, boasting an AMD R5 6600H processor with 6 cores and 12 threads. This Mini PC is built for those who require more processing power, making it ideal for tasks like video editing, 3D rendering, and gaming. The DDR5 RAM and PCIe 3.0 SSD ensure fast data transfer and quick application loading times, while the robust cooling system keeps it running efficiently.

Best For: Content creators, gamers, and professionals needing high processing power.

3. GEEKOM A5 – AMD Ryzen 7 5825U Mini PC

Specifications:

Processor: AMD Ryzen 7 5825U (8 Core, 16 Thread, up to 4.5GHz)
RAM: 32GB DDR4
Storage: 512GB M.2 PCIe NVMe SSD
Operating System: Windows 11 Pro
Graphics: Vega 8

Overview: The GEEKOM A5 is tailored for users who demand top-tier performance in a Mini PC. Its AMD Ryzen 7 5825U processor, along with 32GB of DDR4 RAM, allows for seamless multitasking and heavy-duty computing. Whether you’re working with large datasets, running virtual machines, or gaming at high settings, this Mini PC delivers. The Vega 8 graphics further enhance its capability, making it a solid choice for creative professionals and gamers alike.

Best For: Power users, professionals, and serious gamers.

4. Firebat MiniPC – AMD R7 7735HS/6600H Mini PC

Specifications:

Processor: AMD R7 7735HS / R7 6600H
RAM: 16GB DDR5
Storage: 512GB SSD
Connectivity: RJ45, WiFi 6, Bluetooth 5.2
Special Feature: Colorful Gamer Design

Overview: The Firebat MiniPC stands out with its eye-catching design and high-performance components. The AMD R7 7735HS or 6600H processors offer powerful multi-threaded performance, making it a great choice for gaming and creative work. The inclusion of DDR5 RAM and a 512GB SSD ensures fast load times and smooth operation, even during intense sessions. Its unique gamer-centric design adds a touch of flair to any setup.

Best For: Gamers, creative professionals, and those who appreciate stylish design.

5. Firebat AK2 Plus – Intel N100 Mini PC

Specifications:

Processor: Intel N100
RAM: 16GB
Storage: 512GB SSD
Connectivity: Dual-Band WiFi 5, Bluetooth 4.2

Overview: The Firebat AK2 Plus is a versatile Mini PC that offers a good balance of performance and affordability. Its Intel N100 processor and 16GB of RAM are capable of handling everyday tasks such as web browsing, office work, and streaming. The dual-band WiFi 5 and Bluetooth 4.2 ensure stable connections, while the compact design makes it easy to place anywhere.

Best For: Budget-conscious users, students, and those needing a reliable secondary PC.

Each of these Mini PCs offers something unique, catering to different needs and budgets. Whether you’re a gamer, a professional, or just someone looking for a reliable and compact computer, our Mini PC collection at BytePlaza has you covered. Explore these options and find the perfect Mini PC that fits your lifestyle and computing requirements.

Prime Day Sniping: Top Tech Deals for Developers

3a5abi 🥷 — Tue, 16 Jul 2024 20:45:17 +0000

Prime Day is here, and it’s the perfect opportunity to snag some fantastic deals on laptops, computers, and tablets. Here are some of the top picks that will elevate your tech game without breaking the bank.

⚡For more details please visit -> DevToys.io- Deal Sniping 🛸

Laptops

Acer Aspire 5 15 Slim Laptop
🔥Deal Price: $449.99 (15% off, was $529.99)

ASUS ROG Strix G16 (2024) Gaming Laptop
🔥Deal Price: $1,099.99 (21% off, was $1,399.99)

Lenovo Newest V15 Series Laptop
🔥Deal Price: $439.99 (20% off, was $549.99)

Desktops

Alienware Aurora R15 Gaming Desktop
🔥Deal Price: $1,999.99 (20% off, was $2,499.97)

CyberpowerPC Gamer Master Gaming PC
🔥Deal Price: $849.99 (15% off, was $999.99)

Alienware Aurora R16 Gaming Desktop
🔥Deal Price: $1,869.99 (15% off, was $2,199.99)

Tablets

Samsung Galaxy Tab A9+ Tablet
🔥Deal Price: $142.49 (35% off, was $219.99)

Samsung Galaxy Tab S9 FE
🔥Deal Price: $313.49 (30% off, was $449.99)

Apple iPad (10th Generation)
🔥Deal Price: $449.99 (10% off, was $499.00)

🫠 Take advantage of these Prime Day deals to upgrade your tech arsenal with top-rated laptops, computers, and tablets. Don’t miss out on these limited-time offers! Check out the details here! DevToys.io - Deal Sniping 🔥

Harnessing NgRx for Effortless Angular State Management

3a5abi 🥷 — Sun, 14 Jul 2024 02:39:19 +0000

Managing state in complex Angular applications can be a daunting task, especially as the application grows and the interdependencies between different parts of the application become more intricate. NgRx, a powerful state management library inspired by Redux, offers a robust solution to this challenge. In this blog post, we’ll delve deep into the key concepts of NgRx, how it can streamline state management, and best practices for integrating NgRx into your Angular projects. We’ll also provide a practical tutorial to help you get started with NgRx in your own Angular applications.

What is NgRx?

NgRx is a set of reactive libraries for Angular, built around the principles of reactive programming using RxJS. It provides a unidirectional data flow, which helps in maintaining a single source of truth for the application’s state. This makes it easier to manage and predict state changes, resulting in more maintainable and testable code.

Key Concepts of NgRx

Store

The store is the central repository where the state of the application is stored. It holds the state as a single immutable object. This centralization of state makes it easier to debug and understand the flow of data in your application.

Actions

Actions are payloads of information that send data from your application to your store. They describe what should be done, but not how. Actions are dispatched from components and services to trigger state changes.

import { createAction, props } from '@ngrx/store';

export const loadItems = createAction('[Item List] Load Items');
export const loadItemsSuccess = createAction(
  '[Item List] Load Items Success',
  props<{ items: Item[] }>()
);

Reducers

Reducers are pure functions that take the current state and an action to return a new state. They specify how the application’s state changes in response to actions. Reducers should be kept simple and free of side effects.

import { createReducer, on } from '@ngrx/store';
import { loadItemsSuccess } from './item.actions';
import { State, initialState } from './item.model';

const _itemReducer = createReducer(
  initialState,
  on(loadItemsSuccess, (state, { items }) => ({ ...state, items }))
);

export function itemReducer(state: State | undefined, action: Action) {
  return _itemReducer(state, action);
}

Selectors

Selectors are functions that extract slices of state from the store. They are used to obtain pieces of state and compute derived states. Selectors help in decoupling component logic from the store structure.

import { createSelector, createFeatureSelector } from '@ngrx/store';

export const selectItemState = createFeatureSelector<State>('items');

export const selectAllItems = createSelector(
  selectItemState,
  (state: State) => state.items
);

Effects

Effects handle side effects like asynchronous operations. They listen for actions dispatched to the store and perform tasks like HTTP requests or other operations, then dispatch new actions. Effects are a key part of NgRx that help keep reducers pure and side-effect-free.

import { Injectable } from '@angular/core';
import { Actions, createEffect, ofType } from '@ngrx/effects';
import { loadItems, loadItemsSuccess } from './item.actions';
import { map, mergeMap } from 'rxjs/operators';
import { ItemService } from './item.service';

@Injectable()
export class ItemEffects {
  loadItems$ = createEffect(() =>
    this.actions$.pipe(
      ofType(loadItems),
      mergeMap(() => this.itemService.getAll().pipe(
        map((items) => loadItemsSuccess({ items }))
      ))
    )
  );

  constructor(
    private actions$: Actions,
    private itemService: ItemService
  ) {}
}

👀 For a hands-on tutorial please visit DevToys.io - Harnessing NgRx For Effortless Angular State Management for the full article! 🔥

🤓 Looking for more resources to become an expert in Angular stack? This is a MUST read!🔥

What’s New in .NET 9 Preview 6: Comprehensive Overview

3a5abi 🥷 — Wed, 10 Jul 2024 18:59:43 +0000

On July 9th, 2024, Microsoft released .NET 9 Preview 6, featuring significant updates and enhancements across the framework. Key highlights include:

Runtime Updates:

ARM64 Code Generation: Improved data loading/storing, enhancing execution time.
Code Layout: Optimized basic block ordering for better performance.
Loop Optimizations: Enhanced performance by flipping loop counter variables.
Reduced Address Exposure: Better tracking of local variables for more optimizations.
AVX10v1 Support: New SIMD instruction set for AVX10-enabled hardware. Hardware Intrinsic Code Generation: Improved handling of constants in hardware intrinsics.
Constant Folding: Enhanced for floating-point and SIMD operations.

SDK Updates:

NuGetAudit: Warnings for vulnerabilities in transitive dependencies.
dotnet nuget why: Command to identify usage of transitive packages.
MSBuild BuildChecks: Enforces rules during builds, similar to Roslyn Analyzers.

.NET MAUI Updates:

Quality Improvements: Expanded test coverage and bug fixing for Android and iOS development.
ASP.NET Core Updates:
Fingerprinting of Static Web Assets: Improved caching and load times.
Enhanced Distributed Tracing for SignalR: Better tracing capabilities.
Microsoft.AspNetCore.OpenAPI Enhancements: Improved attribute support and schema transformers.
New Analyzer for [Authorize] and [AllowAnonymous]: Warns when [Authorize] is overridden.

👀 Please visit What’s New in .NET 9 Preview 6: Comprehensive Overview - DevToys.io for an in-depth overview of these items! 🔥

C# 13 Updates:

Partial Properties: Supports source generators, making APIs intuitive.
Primary Constructors in Logging Source Generator: Logging using classes with primary constructors.
System.Text.Json Updates:
Respecting Nullable Annotations: Enforces nullability during serialization/deserialization.
Requiring Non-Optional Constructor Parameters: Treats non-optional constructor parameters as required.
Ordering JsonObject Properties: Enables explicit property order manipulation.
Additional Contract Metadata APIs: Exposes constructor metadata and improved attribute support.

Libraries Updates:

[GeneratedRegex] on Properties: Supports partial properties in C# 13.
Regex.EnumerateSplits: Span-based input without allocation.
OrderedDictionary: New generic collection.
ReadOnlySet: For creating read-only views of sets.
Span-Based APIs: New features for file operations and string manipulations.
Base64Url: Methods for Base64Url encoding/decoding. SocketsHttpHandler by Default: Improved configurability in HttpClientFactory.
TLS Resume with Client Certificates on Linux: Adds support for TLS resume on Linux.
Metrics Gauge Instrument: Records non-additive values like background noise level.

👀 Please visit What’s New in .NET 9 Preview 6: Comprehensive Overview - DevToys.io for an in-depth overview of these items! 🔥

Enhancing Your React Native App with Reanimated 3 Using Expo

3a5abi 🥷 — Tue, 09 Jul 2024 21:45:45 +0000

Animations can significantly enhance the user experience of any mobile application. They make interactions feel more intuitive, provide feedback, and create a polished, professional look. However, achieving smooth, high-performance animations in React Native can be challenging due to the JavaScript thread’s limitations. This is where Reanimated 3 comes in. This powerful library allows developers to create complex, performant animations with ease. In this blog post, we’ll explore how to use Reanimated 3 to build high-performance animations in your React Native app using Expo.

Why Reanimated 3?

Reanimated 3 stands out from other animation libraries because it runs animations on the UI thread, not the JavaScript thread. This means animations remain smooth and responsive, even under heavy load or when the JavaScript thread is busy. Reanimated 3 also introduces a new declarative API, making it easier to create and manage animations.

Setting Up Reanimated 3

Setting up Reanimated 3 with Expo is straightforward. Follow the steps below to get started.

Step 1: Create a New Expo Project

First, we need to create a new Expo project using the Reanimated template:

yarn create expo-app my-app -e with-reanimated
cd my-app
yarn start --reset-cache

Creating Basic Animations

Let’s start with a simple animation example: changing the width of a box when a button is pressed.

Sample Animated App Code

The following code is for the App.js file created during the setup:

import Animated, {
  useSharedValue,
  withTiming,
  useAnimatedStyle,
  Easing,
} from "react-native-reanimated";
import { View, Button } from "react-native";
import React from "react";

export default function AnimatedStyleUpdateExample(props) {
  const randomWidth = useSharedValue(10);

  const config = {
    duration: 500,
    easing: Easing.bezier(0.5, 0.01, 0, 1),
  };

  const style = useAnimatedStyle(() => {
    return {
      width: withTiming(randomWidth.value, config),
    };
  });

  return (
    <View
      style={{
        flex: 1,
        alignItems: "center",
        justifyContent: "center",
        flexDirection: "column",
      }}
    >
      <Animated.View
        style={[
          { width: 100, height: 80, backgroundColor: "black", margin: 30 },
          style,
        ]}
      />
      <Button
        title="toggle"
        onPress={() => {
          randomWidth.value = Math.random() * 350;
        }}
      />
    </View>
  );
}

🤔 Looking for a resource to power up your React Native skills? Search no more! Check out this AMAZING hands-on guide. 🔥

React and React Native: A complete hands-on guide to modern web and mobile development with React.js

🤓 Practical Tutorial: Building an Animated To-Do List 🛸

Now, let’s build a practical example – an animated to-do list app using Reanimated 3. This app will allow users to add, remove, and reorder tasks with smooth animations.

✨ TL;DR – Checkout the GitHub Repo!✨

🔗 ===> judescripts/rn-reanimated: DevToys.io blog tutorial on working with React Native Reanimated 3 (github.com)

Step 1: Set Up the Project

Create a new Expo project if you haven’t already:

yarn create expo-app my-todo-app -e with-reanimated
cd my-todo-app

Step 2: Install react-native-gesture-handler

Ensure react-native-gesture-handler is installed:

yarn add react-native-gesture-handler

Step 3: Implement the To-Do List

Create the ToDoList.js component:

import React, { useState } from 'react';
import { View, TextInput, Button, StyleSheet, FlatList } from 'react-native';
import TaskItem from './TaskItem';

const ToDoList = () => {
  const [tasks, setTasks] = useState([]);
  const [task, setTask] = useState('');

  const addTask = () => {
    if (task.trim()) {
      setTasks([...tasks, { id: Date.now().toString(), title: task }]);
      setTask('');
    }
  };

  const removeTask = (id) => {
    setTasks((prevTasks) => prevTasks.filter((item) => item.id !== id));
  };

  const renderItem = ({ item }) => (
    <TaskItem item={item} removeTask={removeTask} />
  );

  return (
    <View style={styles.container}>
      <TextInput
        style={styles.input}
        value={task}
        onChangeText={setTask}
        placeholder="Add a task"
      />
      <Button title="Add Task" onPress={addTask} />
      <FlatList
        data={tasks}
        renderItem={renderItem}
        keyExtractor={(item) => item.id}
      />
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    padding: 20,
  },
  input: {
    height: 40,
    borderColor: 'gray',
    borderWidth: 1,
    marginBottom: 10,
    paddingHorizontal: 10,
  },
});

export default ToDoList;

Create the TaskItem.js component using the new Gesture Handler API:

import React from 'react';
import { Text, StyleSheet } from 'react-native';
import Animated, { useSharedValue, useAnimatedStyle, withSpring, withTiming, runOnJS } from 'react-native-reanimated';
import { Gesture, GestureDetector } from 'react-native-gesture-handler';

const TaskItem = ({ item, removeTask }) => {
  const translateX = useSharedValue(0);
  const taskHeight = useSharedValue(70);

  const animatedStyle = useAnimatedStyle(() => {
    return {
      transform: [{ translateX: translateX.value }],
      height: taskHeight.value,
      opacity: taskHeight.value / 70,
    };
  });

  const panGesture = Gesture.Pan()
    .onBegin(() => {
      // Initialize context here if needed
    })
    .onUpdate((event) => {
      translateX.value = event.translationX;
    })
    .onEnd(() => {
      if (translateX.value < -150) {
        translateX.value = withTiming(-200);
        taskHeight.value = withTiming(0, {}, () => {
          runOnJS(removeTask)(item.id);
        });
      } else {
        translateX.value = withSpring(0);
      }
    });

  return (
    <GestureDetector gesture={panGesture}>
      <Animated.View style={[styles.task, animatedStyle]}>
        <Text>{item.title}</Text>
      </Animated.View>
    </GestureDetector>
  );
};

const styles = StyleSheet.create({
  task: {
    height: 70,
    backgroundColor: 'lightgrey',
    justifyContent: 'center',
    paddingHorizontal: 20,
    marginBottom: 10,
    borderRadius: 10,
  },
});

export default TaskItem;

Update your App.js to include the ToDoList component:

import 'react-native-gesture-handler';
import 'react-native-reanimated';
import React from 'react';
import { GestureHandlerRootView } from 'react-native-gesture-handler';
import ToDoList from './ToDoList';

export default function App() {
  return (
    <GestureHandlerRootView style={{ flex: 1 }}>
      <ToDoList />
    </GestureHandlerRootView>
  );
}

Running the Project

To run the project, use the following commands based on the platform you want to test:

Start the Expo development server:

  yarn start --reset-cache

This will give you options to choose the platform, or you can

Directly Start Run on iOS:

  yarn ios

Directly Start Run on Android:

  yarn android

🫠 Now try to add tasks and swipe to the left to delete and you’ll see some cool animations!🧙🏻‍♂️

Conclusion

Reanimated 3 provides a powerful and efficient way to create high-performance animations in React Native. By running animations on the UI thread and offering a declarative API, Reanimated 3 ensures smooth and responsive animations, even under heavy load. In this tutorial, we built an animated to-do list app that allows users to add, remove, and reorder tasks with smooth animations. Start experimenting with Reanimated 3 today and take your React Native app’s user experience to the next level!

Next Steps

For an additional challenge, try implementing the ability to reorder tasks within the to-do list. Share your results and any issues you encounter!

🫠 Did you enjoy this article? Then please visit DevToys.io and subscribe to our newsletter so you can stay connected with all the latest dev news, tools and gadgets! ❤️

Advanced Data Visualization Techniques with D3.js and Plotly

3a5abi 🥷 — Mon, 08 Jul 2024 20:41:59 +0000

In the fast-paced world of data, visualizing information effectively is crucial for extracting insights and making informed decisions. D3.js and Plotly are two standout tools for creating sophisticated data visualizations. In this blog, we’ll delve into the unique strengths of each tool, explore advanced techniques, and provide practical examples to elevate your data visualization game.

Introduction to D3.js and Plotly

D3.js

D3.js (Data-Driven Documents) is a powerful JavaScript library for crafting dynamic and interactive data visualizations in web browsers. Utilizing HTML, SVG, and CSS, D3.js brings data to life through seamless transitions and data-driven transformations. Its fine-grained control over visual representations makes it perfect for custom and intricate visualizations.

Plotly

Plotly is a graphing library that enables the creation of interactive, publication-quality graphs online. Built on top of D3.js and stack.gl, Plotly.js offers a high-level, declarative charting interface that simplifies the creation of complex charts. It supports a wide array of chart types and provides extensive interactivity features right out of the box.

Advanced Techniques with D3.js

1. Custom Transitions and Animations

D3.js excels in creating smooth transitions and animations. Custom transitions can make your visualizations more engaging and comprehensible.

const svg = d3.select("svg");
const circle = svg.append("circle")
  .attr("cx", 50)
  .attr("cy", 50)
  .attr("r", 20);

circle.transition()
  .duration(2000)
  .attr("cx", 200)
  .attr("cy", 200)
  .attr("r", 50);

2. Complex Interactions

D3.js allows the creation of sophisticated interactions, such as brushing, zooming, and panning, which enhance user engagement and provide deeper insights into the data.

const svg = d3.select("svg");
const circle = svg.append("circle")
  .attr("cx", 50)
  .attr("cy", 50)
  .attr("r", 20);

circle.transition()
  .duration(2000)
  .attr("cx", 200)
  .attr("cy", 200)
  .attr("r", 50);

3. Data Binding and Updates

D3.js’s powerful data binding capabilities make it easy to update visualizations based on new data, essential for real-time data visualizations.

const data = [10, 20, 30, 40];
const rects = svg.selectAll("rect")
  .data(data);

rects.enter().append("rect")
  .attr("x", (d, i) => i * 30)
  .attr("y", d => 100 - d)
  .attr("width", 25)
  .attr("height", d => d)
  .attr("fill", "blue");

Advanced Techniques with Plotly

1. 3D Plots

Plotly simplifies the creation of stunning 3D visualizations, particularly useful for complex datasets.

const trace1 = {
  x: [1, 2, 3],
  y: [10, 11, 12],
  z: [5, 6, 7],
  mode: 'markers',
  type: 'scatter3d'
};

const data = [trace1];
Plotly.newPlot('myDiv', data);

2. Interactive Dashboards

Plotly makes it easy to create interactive, web-based dashboards with minimal code, integrating seamlessly with Plotly graphs and offering extensive customization options.

const data = [
  {
    x: ['A', 'B', 'C'],
    y: [4, 1, 2],
    type: 'bar'
  }
];

const layout = {
  title: 'Dash Data Visualization'
};

Plotly.newPlot('myDiv', data, layout);

3. Real-time Data Updates

Plotly makes it easy to create visualizations that update in real-time, essential for monitoring live data streams.

const data = [{
  x: [1, 2, 3, 4, 5],
  y: [1, 2, 4, 8, 16],
  mode: 'lines+markers'
}];

Plotly.newPlot('myDiv', data);

setInterval(function() {
  Plotly.extendTraces('myDiv', {
    y: [[Math.random() * 10]]
  }, [0]);
}, 1000);

🤓 Want to deep dive into the world of D3.js? You NEED to check this out! Learn D3.js: Create interactive data-driven visualizations for the web with the D3.js library

✨ Example Project Tutorial: Real-Time Sales Dashboard ✨

Project Overview

In this project, you'll create a real-time sales dashboard using D3.js and Plotly. The dashboard will display sales data that updates in real-time, using both D3.js for intricate custom visualizations and Plotly for high-level, interactive charts.

👀 TL;DR - You can find the full sample github repo here! 🔗 => judescripts/real-time-sales-dashboard (github.com)

Step 1: Setup the Project

Initialize the Node.js Project Create a new directory for your project and initialize a Node.js project.

   mkdir real-time-sales-dashboard
   cd real-time-sales-dashboard
   npm init -y

Install Dependencies Install the necessary dependencies: Express for the server and Socket.IO for real-time communication.

   npm install express socket.io

Project Structure Create the following folder structure:

   real-time-sales-dashboard/
   ├── public/
   │   ├── index.html
   │   ├── dashboard.js
   │   ├── d3.v6.min.js
   │   ├── plotly-latest.min.js
   │   └── styles.css
   ├── server.js
   └── package.json

Step 2: Server Setup

Create server.js This file will set up the Express server and Socket.IO for real-time updates.

   const express = require('express');
   const http = require('http');
   const { Server } = require('socket.io');

   const app = express();
   const server = http.createServer(app);
   const io = new Server(server);

   app.use(express.static('public'));

   io.on('connection', (socket) => {
     console.log('New client connected');

     const sendSalesData = () => {
       const salesData = generateRandomSalesData();
       socket.emit('salesData', salesData);
     };

     const interval = setInterval(sendSalesData, 2000);

     socket.on('disconnect', () => {
       console.log('Client disconnected');
       clearInterval(interval);
     });
   });

   const generateRandomSalesData = () => {
     return [
       { product: 'Product A', sales: Math.floor(Math.random() * 100) },
       { product: 'Product B', sales: Math.floor(Math.random() * 100) },
       { product: 'Product C', sales: Math.floor(Math.random() * 100) },
       { product: 'Product D', sales: Math.floor(Math.random() * 100) }
     ];
   };

   const PORT = process.env.PORT || 4000;
   server.listen(PORT, () => console.log(`Server running on port ${PORT}`));

Step 3: Client Setup

Create index.html This file will include the necessary HTML and scripts for D3.js and Plotly.

   <!DOCTYPE html>
   <html lang="en">
   <head>
     <meta charset="UTF-8">
     <title>Real-Time Sales Dashboard</title>
     <script src="/socket.io/socket.io.js"></script>
     <script src="https://d3js.org/d3.v6.min.js"></script>
     <script src="https://cdn.plot.ly/plotly-latest.min.js"></script>
     <link rel="stylesheet" href="styles.css">
   </head>
   <body>
     <h1>Real-Time Sales Dashboard</h1>
     <div id="d3-chart"></div>
     <div id="plotly-chart"></div>
     <script src="dashboard.js"></script>
   </body>
   </html>

Create dashboard.js This file will handle the client-side logic for rendering the charts and updating them in real-time.

   const socket = io();

   // D3.js setup
   const d3Chart = d3.select('#d3-chart')
     .append('svg')
     .attr('width', 600)
     .attr('height', 400)
     .append('g')
     .attr('transform', 'translate(50,50)');

   const xScale = d3.scaleBand().range([0, 500]).padding(0.1);
   const yScale = d3.scaleLinear().range([300, 0]);

   const xAxis = d3Chart.append('g')
     .attr('transform', 'translate(0,300)');

   const yAxis = d3Chart.append('g');

   const updateD3Chart = (data) => {
     xScale.domain(data.map(d => d.product));
     yScale.domain([0, d3.max(data, d => d.sales)]);

     xAxis.call(d3.axisBottom(xScale));
     yAxis.call(d3.axisLeft(yScale));

     const bars = d3Chart.selectAll('.bar').data(data);

     bars.enter()
       .append('rect')
       .attr('class', 'bar')
       .merge(bars)
       .transition()
       .duration(1000)
       .attr('x', d => xScale(d.product))
       .attr('y', d => yScale(d.sales))
       .attr('width', xScale.bandwidth())
       .attr('height', d => 300 - yScale(d.sales))
       .attr('fill', 'steelblue');

     bars.exit().remove();

     // Add legend
     const legend = d3Chart.selectAll('.legend').data(data);

     legend.enter()
       .append('text')
       .attr('class', 'legend')
       .attr('x', (d, i) => xScale(d.product) + xScale.bandwidth() / 2)
       .attr('y', d => yScale(d.sales) - 10)
       .attr('text-anchor', 'middle')
       .merge(legend)
       .text(d => d.sales);

     legend.exit().remove();
   };

   // Plotly setup
   const plotlyData = [{
     x: [],
     y: [],
     mode: 'lines+markers'
   }];

   const plotlyLayout = {
     title: 'Real-Time Sales',
     xaxis: {
       title: 'Time'
     },
     yaxis: {
       title: 'Total Sales'
     }
   };

   Plotly.newPlot('plotly-chart', plotlyData, plotlyLayout);

   const updatePlotlyChart = (data) => {
     const time = new Date().toLocaleTimeString();
     const sales = data.reduce((sum, d) => sum + d.sales, 0);

     Plotly.extendTraces('plotly-chart', {
       x: [[time]],
       y: [[sales]]
     }, [0]);

     if (plotlyData[0].x.length > 10) {
       Plotly.relayout('plotly-chart', {
         'xaxis.range': [plotlyData[0].x.length - 10, plotlyData[0].x.length]
       });
     }
   };

   socket.on('salesData', (data) => {
     updateD3Chart(data);
     updatePlotlyChart(data);
   });

Create styles.css Enhance the styling of the dashboard and the charts.

   body {
     font-family: Arial, sans-serif;
     display: flex;
     flex-direction: column;
     align-items: center;
     background-color: #f4f4f4;
     margin: 0;
     padding: 0;
   }

   h1 {
     margin: 20px 0;
     color: #333;
   }

   #d3-chart, #plotly-chart {
     margin: 20px 0;
     padding: 20px;
     background-color: #fff;
     box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
     border-radius: 8px;
   }

   #d3-chart svg {
     background-color: #f9f9f9;
     box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
   }

   .bar {
     transition: fill 0.3s;
   }

   .bar:hover {
     fill: orange;
   }

   .legend {
     font-size: 12px;
     fill: #000;
   }

   .axis text {
     font-size: 12px;
     fill: #333;
   }

   .axis path,
   .axis line {
     stroke: #333;
   }

   .axis-label {
     font-size: 14px;
     fill: #333;
     text-anchor: middle;
   }

Step 4: Run the Project

Start the Server Run the server using Node.js.

   node server.js

Open in Browser Open your browser and navigate to http://localhost:4000 to see your real-time sales dashboard in action.

Conclusion

Both D3.js and Plotly offer robust features for creating advanced data visualizations. D3.js provides unparalleled control and flexibility for custom visualizations, while Plotly excels in creating high-quality interactive charts with less code. By mastering these tools and their advanced techniques, you can craft compelling visualizations that drive insights and make your data stories more impactful.

Whether you're working on complex data analysis projects, developing interactive dashboards, or simply enhancing your data visualization skills, D3.js and Plotly have the capabilities you need to bring your data to life. Happy coding!

🤔 Looking for a hands-on course to master the art of Data Visualization? This is a 🔥 FREE 🔥 course to check out from Udacity! Data Visualization and D3.js Learn the fundamentals of data visualization and apply design and narrative concepts to create your own visualization.

🥰 If you enjoyed this article come visit us and subscribe to our newsletter for all things for fellow hackers! 🔗 DevToys.io

Can't Miss: Sniping the Best 4th of July Deals for Developers on Amazon

3a5abi 🥷 — Fri, 05 Jul 2024 00:35:09 +0000

As developers, we know how important it is to stay ahead of the game, especially when it comes to snagging the best tech deals. This 4th of July, Amazon is offering some unmissable lightning deals on a range of products perfect for enhancing your workspace and boosting your productivity. Check out these curated blog posts to find the top deals on mini computers, monitors, laptops, and accessories. Act fast—these deals are as hot as the summer sun and won’t last long!

1. Unmissable 4th of July Mini PC Lightning Deals on Amazon

Upgrade your setup with these incredible deals on mini computers. Perfect for creating a powerful, space-saving workstation.
⚡Read more

2. Incredible 4th of July Laptop Lightning Deals on Amazon

Discover amazing discounts on high-performance laptops that are ideal for coding, gaming, or everyday use.
⚡Read more

3. Hot 4th of July Accessory Deals You Can't Miss on Amazon

From SSDs to gaming headsets, find the best deals on peripherals and accessories to complete your tech arsenal.
⚡Read more

4. Unbeatable 4th of July Lightning Deals on Amazon for Monitors

Elevate your visual experience with top-rated monitors available at unbeatable prices. Perfect for coding, gaming, and entertainment.
⚡Read more

Stay tuned and act quickly to make the most of these fantastic deals. Sniping these offers will ensure you have the best gear to enhance your development workflow and enjoy the ultimate tech experience this summer. Don't miss out—grab these deals before they’re gone!

Fun and Fantastic Algorithms Every Developer Should Know

3a5abi 🥷 — Thu, 04 Jul 2024 00:14:01 +0000

Algorithms are the magic spells of the software world, turning complex problems into manageable tasks and making our code work like a charm. Whether you're sorting through data, searching for the needle in the haystack, or finding the shortest path in a maze, there's an algorithm to help you out. We'll dive into some fun and fantastic algorithms that every developer should know and love.

1. Sorting Algorithms

Bubble Sort

Bubble Sort is the classic "bubble up" game. Imagine bubbles rising to the surface in a glass of soda, with each bubble representing a data element. It’s a simple algorithm that compares and swaps adjacent elements until the entire list is sorted.

def bubble_sort(arr):
    n = len(arr)
    for i in range(n):
        for j in range(0, n-i-1):
            if arr[j] > arr[j+1]:
                arr[j], arr[j+1] = arr[j+1], arr[j]
    return arr

Quick Sort

Quick Sort is the divide-and-conquer superhero of sorting. It picks a pivot and splits the array into smaller parts, sorting them independently before merging them back together. It’s like organizing your bookshelf by first separating books into genres and then sorting each genre individually.

def quick_sort(arr):
    if len(arr) <= 1:
        return arr
    else:
        pivot = arr[len(arr) // 2]
        left = [x for x in arr if x < pivot]
        middle = [x for x in arr if x == pivot]
        right = [x for x in arr if x > pivot]
        return quick_sort(left) + middle + quick_sort(right)

2. Search Algorithms

Linear Search

Linear Search is like flipping through the pages of a book to find a specific word. It’s straightforward and checks each element until it finds the target. Perfect for small datasets or when you need a simple solution.

def linear_search(arr, target):
    for i in range(len(arr)):
        if arr[i] == target:
            return i
    return -1

Binary Search

Binary Search is the librarian's secret weapon. With a sorted list, it splits the search range in half, narrowing down the possibilities until it finds the target. It’s like playing a game of "hot and cold" with precision.

def binary_search(arr, target):
    low, high = 0, len(arr) - 1
    while low <= high:
        mid = (low + high) // 2
        if arr[mid] == target:
            return mid
        elif arr[mid] < target:
            low = mid + 1
        else:
            high = mid - 1
    return -1

This if an amazing book to explore for anyone who wants a deeper dive into the world of algorithms! 🤓

Advanced Algorithms and Data Structures

3. Graph Algorithms

Dijkstra's Algorithm

Dijkstra's Algorithm is the ultimate GPS navigator. It finds the shortest path in a graph, making it ideal for routing and network optimization. Think of it as plotting the quickest route from your home to your favorite ice cream parlor.

import heapq

def dijkstra(graph, start):
    queue = []
    heapq.heappush(queue, (0, start))
    distances = {node: float('infinity') for node in graph}
    distances[start] = 0

    while queue:
        current_distance, current_node = heapq.heappop(queue)

        if current_distance > distances[current_node]:
            continue

        for neighbor, weight in graph[current_node].items():
            distance = current_distance + weight
            if distance < distances[neighbor]:
                distances[neighbor] = distance
                heapq.heappush(queue, (distance, neighbor))

    return distances

4. Dynamic Programming Algorithms

Fibonacci Sequence

The Fibonacci sequence is nature's coding puzzle. Using dynamic programming, we can generate the sequence efficiently, like filling in the missing pieces of a beautiful mosaic.

def fibonacci(n):
    if n <= 1:
        return n
    fib = [0, 1]
    for i in range(2, n+1):
        fib.append(fib[i-1] + fib[i-2])
    return fib[n]

5. Machine Learning Algorithms

K-Nearest Neighbors (KNN)

KNN is like finding your clique in a high school cafeteria. It classifies data points based on the "neighborhood" they belong to, making it a powerful tool for both classification and regression tasks.

import numpy as np
from collections import Counter

def knn_predict(data, query, k):
    distances = []
    for group in data:
        for features in data[group]:
            euclidean_distance = np.linalg.norm(np.array(features) - np.array(query))
            distances.append((euclidean_distance, group))

    votes = [i[1] for i in sorted(distances)[:k]]
    vote_result = Counter(votes).most_common(1)[0][0]
    return vote_result

Conclusion

These fun and fantastic algorithms are the secret ingredients to making your software efficient, reliable, and powerful. From sorting and searching to graph navigation and dynamic programming, mastering these algorithms will enhance your problem-solving skills and open up new possibilities in your coding journey.

Explore more exciting tutorials and resources on DevToys.io, your playground for all things software development. Happy coding!

❤️ If you enjoyed this article, come check out our hacker community for more! Sign up for our newsletter to stay ahead of the curve! DevToys.io 👽

Creating a Dynamic Blog with Flask, HTMX, TailwindCSS, and Authentication (Part 2)

3a5abi 🥷 — Tue, 02 Jul 2024 17:58:32 +0000

Building a dynamic blog with Flask and HTMX can be both fun and rewarding. This guide will take you through the entire process, focusing on making your blog interactive without the need for a complex single-page application (SPA) framework. By the end, you’ll have a fully functional blog where users can create, read, update, and delete posts seamlessly.

1️⃣ If you are brand new to HTMX, check out this article! -> Comprehensive Guide to HTMX: Building Dynamic Web Applications with Ease
2️⃣ If you want to focus on barebones without any authentications or adding css framework, check out Part 1 of this tutorial for a simpler version of the app here -> Building a Dynamic Blog with Flask and HTMX

What You’ll Need

Basic knowledge of HTML, CSS, and JavaScript
Basic understanding of Python and Flask (or your preferred backend framework)
Python and pip installed on your machine

👽 TL:DR You can find the complete source code here-> GitHub Repo 🔗 for Part 2 Tutorial

Step 1: Setting Up Your Environment

1.1 Install Flask
First things first, let’s set up our Flask environment. Open your terminal and create a virtual environment, then install Flask:

python -m venv venv
source venv/bin/activate  # On Windows, use `venv\Scripts\activate`
pip install Flask Flask-SQLAlchemy Flask-Login Flask-Bcrypt

1.2 Install TailwindCSS
Next, let’s set up TailwindCSS. You’ll need Node.js and npm installed on your machine.

Install TailwindCSS:

npm install -D tailwindcss
npx tailwindcss init

Configure TailwindCSS by editing the tailwind.config.js file:

module.exports = {
  content: [
    './templates/**/*.html',
    './static/js/**/*.js',
  ],
  theme: {
    extend: {},
  },
  plugins: [],
}

Create a TailwindCSS input file static/css/tailwind.css:

@tailwind base;
@tailwind components;
@tailwind utilities;

Add a build script to your package.json:

"scripts": {
  "build": "tailwindcss -i ./static/css/tailwind.css -o ./static/css/styles.css --watch"
}

Run the build script to generate your CSS:

npm run build

1.3 Create the Project Structure
Organize your project directory as follows:

blog_app/
├── static/
│   ├── css/
│   │   └── tailwind.css
│   └── js/
│       └── scripts.js
├── templates/
│   ├── base.html
│   ├── index.html
│   ├── post.html
│   ├── edit_post.html
│   ├── login.html
│   ├── register.html
│   └── post_snippet.html
├── app.py
└── models.py

Step 2: Create the Flask Backend

2.1 Define Models
In models.py, define a simple data model for blog posts and user authentication using SQLAlchemy:

from flask_sqlalchemy import SQLAlchemy
from flask_login import UserMixin
from flask_bcrypt import Bcrypt

db = SQLAlchemy()
bcrypt = Bcrypt()

class User(db.Model, UserMixin):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(150), unique=True, nullable=False)
    email = db.Column(db.String(150), unique=True, nullable=False)
    password = db.Column(db.String(150), nullable=False)

class Post(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = db.Column(db.String(100), nullable=False)
    content = db.Column(db.Text, nullable=False)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
    user = db.relationship('User', backref='posts')

2.2 Set Up Flask Application
Next, set up your Flask application in app.py:

from flask import Flask, render_template, request, redirect, url_for, flash
from flask_login import LoginManager, login_user, logout_user, login_required, current_user
from models import db, User, Post, bcrypt

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///blog.db'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
app.config['SECRET_KEY'] = 'your_secret_key'

db.init_app(app)
login_manager = LoginManager(app)
login_manager.login_view = 'login'


@login_manager.user_loader
def load_user(user_id):
    return User.query.get(int(user_id))


with app.app_context():
    db.create_all()  # Create database tables


@app.route('/')
def index():
    posts = Post.query.all()
    return render_template('index.html', posts=posts)


@app.route('/post/<int:post_id>')
def post(post_id):
    post = Post.query.get_or_404(post_id)
    return render_template('post.html', post=post)


@app.route('/create', methods=['POST'])
@login_required
def create():
    title = request.form['title']
    content = request.form['content']

    if not title or not content:
        flash("Title and content cannot be empty", "danger")
        return redirect(url_for('index'))

    new_post = Post(title=title, content=content, user_id=current_user.id)
    db.session.add(new_post)
    db.session.commit()

    return render_template('post_snippet.html', post=new_post)


@app.route('/edit/<int:post_id>', methods=['GET', 'POST'])
@login_required
def edit(post_id):
    post = Post.query.get_or_404(post_id)
    if request.method == 'POST':
        if post.user_id != current_user.id:
            flash("You are not authorized to edit this post", "danger")
            return redirect(url_for('index'))

        post.title = request.form['title']
        post.content = request.form['content']
        db.session.commit()
        return redirect(url_for('post', post_id=post.id))
    return render_template('edit_post.html', post=post)


@app.route('/delete/<int:post_id>', methods=['POST', 'DELETE'])
@login_required
def delete(post_id):
    post = Post.query.get_or_404(post_id)
    if post.user_id != current_user.id:
        flash("You are not authorized to delete this post", "danger")
        return redirect(url_for('index'))

    db.session.delete(post)
    db.session.commit()
    return '<script>window.location.href = "{}";</script>'.format(url_for('index'))


@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        email = request.form['email']
        password = request.form['password']
        user = User.query.filter_by(email=email).first()
        if user and bcrypt.check_password_hash(user.password, password):
            login_user(user)
            return redirect(url_for('index'))
        flash('Invalid email or password', 'danger')
    return render_template('login.html')


@app.route('/register', methods=['GET', 'POST'])
def register():
    if request.method == 'POST':
        username = request.form['username']
        email = request.form['email']
        password = request.form['password']
        hashed_password = bcrypt.generate_password_hash(password).decode('utf-8')
        new_user = User(username=username, email=email, password=hashed_password)
        db.session.add(new_user)
        db.session.commit()
        flash('Account created successfully', 'success')
        return redirect(url_for('login'))
    return render_template('register.html')


@app.route('/logout')
@login_required
def logout():
    logout_user()
    return redirect(url_for('index'))


if __name__ == '__main__':
    app.run(debug=True)

Step 3: Create HTML Templates

3.1 Base Template
In templates/base.html, define the base HTML structure:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Blog App</title>
    <link rel="stylesheet" href="{{ url_for('static', filename='css/styles.css') }}">
    <script src="https://unpkg.com/htmx.org@2.0.0"></script>
    <script src="{{ url_for('static', filename='js/scripts.js') }}" defer></script>
</head>
<body class="bg-gray-100">
    <nav class="bg-gray-800 p-4 text-white">
        <div class="container mx-auto">
            <a href="{{ url_for('index') }}" class="mr-4">Home</a>
            {% if current_user.is_authenticated %}
                <a href="{{ url_for('logout') }}" class="mr-4">Logout</a>
            {% else %}
                <a href="{{ url_for('login') }}" class="mr-4">Login</a>
                <a href="{{ url_for('register') }}">Register</a>
            {% endif %}
        </div>
    </nav>
    <div class="container mx-auto py-8">
        {% with messages = get_flashed_messages(with_categories=true) %}
            {% if messages %}
                {% for category, message in messages %}
                    <div class="alert alert-{{ category }} mb-4 p-4 border-l-4 border-{{ category }}-400 bg-{{ category }}-100 text-{{ category }}-700">{{ message }}</div>
                {% endfor %}
            {% endif %}
        {% endwith %}
        {% block content %}{% endblock %}
    </div>
</body>
</html>

3.2 Index Template
In templates/index.html, create the index page to list all posts:

{% extends "base.html" %}

{% block content %}
<h1 class="text-3xl font-bold text-center mb-8">Blog Posts</h1>
{% if current_user.is_authenticated %}
    <form hx-post="{{ url_for('create') }}" hx-target="#posts" hx-swap="beforeend" method="post" class="mb-8 p-4 bg-white shadow-md rounded">
        <input type="text" name="title" placeholder="Title" required class="w-full p-2 mb-4 border border-gray-300 rounded">
        <textarea name="content" placeholder="Content" required class="w-full p-2 mb-4 border border-gray-300 rounded"></textarea>
        <button type="submit" class="bg-blue-500 text-white py-2 px-4 rounded hover:bg-blue-600">Create</button>
    </form>
{% endif %}
<div id="posts" class="space-y-4">
    {% for post in posts %}
        {% include 'post_snippet.html' %}
    {% endfor %}
</div>
{% endblock %}

3.3 Post Template
In templates/post.html, create the template for displaying a single post:

{% extends "base.html" %}

{% block content %}
<div id="post-{{ post.id }}" class="post bg-white p-8 shadow-md rounded">
    <h1 class="text-2xl font-bold mb-4">{{ post.title }}</h1>
    <p class="mb-4">{{ post.content }}</p>
    {% if current_user.is_authenticated and post.user_id == current_user.id %}
    <div class="post-buttons flex space-x-4">
        <a href="{{ url_for('edit', post_id=post.id) }}"
           class="bg-blue-500 text-white py-2 px-4 rounded hover:bg-blue-600">Edit</a>
        <form action="{{ url_for('delete', post_id=post.id) }}" hx-delete="{{ url_for('delete', post_id=post.id) }}"
              hx-target="#post-{{ post.id }}" hx-swap="outerHTML" method="post"
              class="delete-form inline-block">
            <input type="hidden" name="_method" value="DELETE">
            <button type="submit" class="bg-red-500 text-white py-2 px-4 rounded hover:bg-red-600">Delete</button>
        </form>
    </div>
    {% endif %}
</div>
{% endblock %}

3.4 Post Snippet Template
In templates/post_snippet.html, create a snippet for individual posts to be used for dynamic updates:

<div class="post bg-white p-4 shadow-md rounded" id="post-{{ post.id }}">
    <h2 class="text-xl font-bold"><a href="{{ url_for('post', post_id=post.id) }}" class="hover:underline">{{ post.title }}</a></h2>
    <p class="mb-4">{{ post.content }}</p>
    {% if current_user.is_authenticated and post.user_id == current_user.id %}
        <div class="post-buttons flex space-x-4">
            <form action="{{ url_for('delete', post_id=post.id) }}" hx-delete="{{ url_for('delete', post_id=post.id) }}" hx-target="#post-{{ post.id }}" hx-swap="outerHTML" method="post" class="delete-form inline-block">
                <a href="{{ url_for('edit', post_id=post.id) }}" class="bg-blue-500 text-white py-2 px-4 rounded hover:bg-blue-600">Edit</a>
                <input type="hidden" name="_method" value="DELETE">
                <button type="submit" class="bg-red-500 text-white py-2 px-4 rounded hover:bg-red-600">Delete</button>
            </form>
        </div>
    {% endif %}
</div>

3.5 Edit Post Template
In templates/edit_post.html, create the template for editing a post:

{% extends "base.html" %}

{% block content %}
<h1 class="text-3xl font-bold text-center mb-8">Edit Post</h1>
<form method="post" class="mb-8 p-4 bg-white shadow-md rounded">
    <input type="text" name="title" value="{{ post.title }}" required class="w-full p-2 mb-4 border border-gray-300 rounded">
    <textarea name="content" required class="w-full p-2 mb-4 border border-gray-300 rounded">{{ post.content }}</textarea>
    <button type="submit" class="bg-blue-500 text-white py-2 px-4 rounded hover:bg-blue-600">Save</button>
</form>
{% endblock %}

3.6 Login Template
In templates/login.html, create the template for user login:

{% extends "base.html" %}

{% block content %}
<h1 class="text-3xl font-bold text-center mb-8">Login</h1>
<form method="post" class="mb-8 p-4 bg-white shadow-md rounded">
    <input type="email" name="email" placeholder="Email" required class="w-full p-2 mb-4 border border-gray-300 rounded">
    <input type="password" name="password" placeholder="Password" required class="w-full p-2 mb-4 border border-gray-300 rounded">
    <button type="submit" class="bg-blue-500 text-white py-2 px-4 rounded hover:bg-blue-600">Login</button>
</form>
{% endblock %}

3.7 Register Template
In templates/register.html, create the template for user registration:

{% extends "base.html" %}

{% block content %}
<h1 class="text-3xl font-bold text-center mb-8">Register</h1>
<form method="post" class="mb-8 p-4 bg-white shadow-md rounded">
    <input type="text" name="username" placeholder="Username" required class="w-full p-2 mb-4 border border-gray-300 rounded">
    <input type="email" name="email" placeholder="Email" required class="w-full p-2 mb-4 border border-gray-300 rounded">
    <input type="password" name="password" placeholder="Password" required class="w-full p-2 mb-4 border border-gray-300 rounded">
    <button type="submit" class="bg-blue-500 text-white py-2 px-4 rounded hover:bg-blue-600">Register</button>
</form>
{% endblock %}

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Step 4: Add Enhanced Debugging for HTMX

Create a simple JavaScript file (scripts.js) to handle HTMX events for better debugging:

/* static/js/scripts.js */
document.addEventListener('htmx:afterRequest', (event) => {
    console.log('HTMX request completed:', event.detail);
});

document.addEventListener('htmx:error', (event) => {
    console.error('HTMX request error:', event.detail);
});

Step 5: Testing Your Application

Now that you have set up the backend, created the HTML templates, and added HTMX for interactivity, it’s time to test your application. Make sure your Flask server is running by using the command:

flask --debug run

Open your web browser and navigate to http://127.0.0.1:5000/. You should see your blog’s home page, where you can create, view, edit, and delete blog posts.

Create a Post

Enter a title and content in the form at the top of the page.
Click the “Create” button. The new post should appear instantly on the page without a full page reload.

View a Post

Click on the title of a post to view its full content on a separate page.

Edit a Post

Click the “Edit” link next to a post.
Modify the title or content and click “Save”. You should be redirected to the updated post’s page.
Click home on top to go back to home page.

Delete a Post

Click the “Delete” button next to a post. The post should be removed instantly without a full page reload.

Conclusion

In this comprehensive tutorial, you have learned how to create a dynamic blog application using Flask, HTMX, and TailwindCSS. Here’s a quick recap of what we’ve covered:

Setting up a Flask environment and project structure
Creating and configuring a Flask application
Defining models with SQLAlchemy
Creating HTML templates for your blog
Adding HTMX attributes for dynamic form submission and deletion
Styling your application with TailwindCSS
Adding user authentication and authorization

By following these steps, you can build modern web applications with enhanced interactivity without the need for complex single-page application frameworks. HTMX allows you to keep your workflow simple and productive while providing a smooth user experience.

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