Offline Mode
Some functions might not work
Nam Vo Website
I developed this website to
share my knowledge and satisfy my coding passion
0
Total Articles
0
Knowledge Shared
0
Moments Captured
Reading room
Insightful articles, tutorials, and my coding journey.
LATEST BLOGS
PWA and Service Worker: Making Your Web App Feel Native
You might have seen browsers allow you to install a website like an app. Building a native application takes significant effort, and not many common applications support it. Google Calendar and Gemini are examples. To use them like a native app, I ju...
2026-04-25 17:28:32 +0700
· 3 mins read
Software Engineer
Software Engineer
Frontend
Frontend
CORS and CSRF: How Attackers Exploit the Gaps
I used to think CORS was a security feature. It is, partially. But the more I understood it, the more I realized how narrow its protection actually is. This post walks through how CORS works under the hood, where it breaks down, what CSRF is, and how...
2026-04-04 18:08:15 +0700
· 5 mins read
Software Engineer
Software Engineer
How Google achieves seamless SSO across multiple domains like Gmail and Youtube?
Have you ever wondered how logging into Gmail can automatically sign you into YouTube, Google Drive, and all other Google services? This behind-the-scenes technique is called Single Sign-On (SSO). In this blog, I will show you some techniques that Go...
Software Engineer
Software Engineer
2024-10-13 18:14:25 +0700
·
2 mins read
Solving the "must appear in the GROUP BY clause" Error in Rails and PostgreSQL
This blog will give an example of how to resolve this common error when using group_by in Active Record1. Example problemFirst, take a look at this SQL problem. Imagine you're working on a booking application where users can have multiple sessions. Y...
Software Engineer
Software Engineer
Ruby on Rails
Ruby on Rails
2024-07-10 23:00:10 +0700
·
3 mins read
Custom Fullscreen Button: A Cross-Browser Solution
Fullscreen functionality is a common requirement in web development, especially with media elements like custom video player. In this blog post, I'll share my experience working with fullscreen APITL;DRNote: On iOS browsers, the element must be a vid...
Frontend
Frontend
2024-07-10 21:59:43 +0700
·
2 mins read
How to get table index size in PostgreSQL
Indexes play a crucial role in enhancing the performance of database queries. They allow for faster data retrieval by creating a separate data structure pointing to the data stored in a table. However, indexes come with a cost in terms of disk space ...
Software Engineer
Software Engineer
2024-07-10 23:01:49 +0700
·
1 min read
Recent moments
Capturing the beauty of everyday life through my lens.
Ancient Town - Hoi An
District 4
Quy Nhon
Doflamingo
The boy and his dog
Dong Van - Ha Giang
Popular apps
Discover the ultimate collection of free tools, conveniently accessible in one place.
Image Tools
Transform your images effortlessly, all within your browser. No uploads, no tracking - just pure, private image editing.
Try it now!
Caro Chess
The classic strategic game with Minimax alpha-beta engine. Challenge yourself in Easy, Medium, or Hard mode.
Play it now!
Link Shortener
Now you can shorten your link with a custom path. Say goodbye to complex shortened link characters and enjoy the convenience.
All for free!
QR Code Generator
Simply input your link, and instantly create a QR Code that directly leads to your website, no redirects or tracking involved.
Custom sizes are supported for use in your design.
What is my IP Address?
Check your IP address and find your IP location including city, region, country and postal code
Check it now!