Business Day Math Is Harder Than You Think
Weekends, holidays, and country-specific rules make working day calculations surprisingly tricky. Here's what to watch for.
JavaScript
15 articles tagged with "JavaScript"
Generate Barcodes for Inventory and Shipping
Create Code 128 and Code 39 barcodes programmatically. Tutorial for inventory systems, shipping labels, and asset tracking.
Summarize Text with AI: A Practical Guide
Use AI to summarize articles, documents, and user content. Tutorial with code for content platforms, research tools, and dashboards.
Generate PDFs from HTML with an API
Convert HTML to PDF programmatically. Tutorial covering invoices, reports, receipts, and certificates with code examples.
How to Detect VPN and Proxy Users
Identify VPN, proxy, and datacenter IPs to prevent fraud and enforce geo-restrictions. Complete tutorial with code examples.
Add Secure Password Generation to Your App
Generate cryptographically secure passwords via API. Tutorial with code examples for signup flows, admin panels, and password managers.
PDF Generation API: Invoices, Reports, Documents
Generate PDFs from HTML or Markdown. Perfect for invoices, receipts, reports, and any document you need to create programmatically.
QR Codes: More Useful Than You Think
URLs, WiFi passwords, contact cards, payment links—QR codes do more than you'd expect. Here's how to generate and read them programmatically.
API Caching: The Cheapest Performance Win
Every duplicate API call is wasted money. Here's how to cache responses properly—and when not to.
API Error Handling: Patterns That Actually Work
Stop letting API failures crash your app. Here are the error handling patterns that will save you at 3am.
Add Daily Horoscopes to Your App in 5 Minutes
Build a horoscope feature your users will actually check daily. Working code included.
Email Validation That Actually Works
That regex you found on Stack Overflow is wrong. Here's how to validate emails properly—and why it matters more than you think.
Multi-Currency E-commerce: Stop Losing Sales
Showing prices in local currency increases conversions 20-40%. Here's how to implement multi-currency pricing that actually works.
Weather APIs: Build a Dashboard That's Actually Useful
Current conditions, forecasts, air quality, sunrise times—here's how to build a weather dashboard users will love.
Chuck Norris Jokes API: Add Random Facts to Any App
Add Chuck Norris jokes to your app in under 5 minutes. Real code examples for Slack bots, Discord bots, and loading screens.