What is DeFi? Decentralized Finance, a.k.a. DeFi, refers to the financial products built...

What is a blockchain? Here's the answer for developers: A public blockchain is an open and autono...

My favorite API testing tool is PAW, it's super light-weight and intuitive to use, almost zero lear...

Currency input could be laborious to write up from scratch, especially if you want it to have proper...

There are tutorials for writing countdown from scratch. With momentjs, it should be a pretty simple t...

With VPN and Tor, IP may not be a reliable data anymore. Still there are times when we want to log th...

While working on a financial calculator using Excel as the "reference of truth", I've run into this r...

There is a simple way to validate if an URL is valid in Javascript, no messy Regex needed. const ur...

Here are two commonly used schema validations using Yup: Phone number validation with Regex How to...

I want to read and write Google Sheets with React to update the data for an app I built with Glidea...

Default Bootstrap Tooltip The default Bootstrap tooltip could use some styling help....

Shallow copy We can use spread operator to clone objects. But beware that it only does a s...

Simple day manipulation with Javascript (without using moments) // Construct yesterday, today, tomo...

Found a really neat React playground today! (Reposted from my Indiehackers post) While running node...

When iterating through an array, when should we use for, forEach, or map? Here's a quick summary of...

Array manipulation with Sets Samples on Codepen [...new Set(arr)] // unique array [...new Set(arr)...

Are you good at coding under pressure? I am NOT. Going through the interviews again, and the standard...