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WhatsApp Usernames Are Here: Hide Your Number

WhatsApp is adding usernames so you can chat without sharing your phone number. How reservations work, the optional username key, and how to claim yours.

Jun 29, 20267 min

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Web Dev

JavaScript Callbacks and Promises, Explained

Understand asynchronous JavaScript: callbacks, the problem they cause, and how Promises fix it, with live, runnable examples to try.

Jun 29, 20268 min

Web Dev

JavaScript Events: Clicks, Input and Listeners

Respond to users with JavaScript events: addEventListener, the event object, clicks and input. Build interactivity, live in your browser.

Jun 29, 20268 min

News

Prompt Injection: The #1 Security Risk for AI Apps

Prompt injection is the top vulnerability in LLM apps. See how the attack works, why AI agents make it worse, and how to actually defend your code.

Jun 28, 20267 min

Web Dev

JavaScript Objects: Properties, Methods and this

Model real things with JavaScript objects: properties, methods, dot vs bracket access, and a first look at this, with live code.

Jun 28, 20269 min

Web Dev

The JavaScript DOM: Select and Change the Page

Use JavaScript to read and change a web page: select elements, edit text and styles, and create nodes, all with a live preview.

Jun 28, 20268 min

Web Dev

JavaScript map, filter and reduce, Explained

Transform arrays the modern way with map, filter and reduce. Clear examples of each, runnable live in your browser.

Jun 27, 20269 min

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Decode the logic behind the tech.

WhatsApp Usernames Are Here: Hide Your Number

Latest articles

JavaScript Callbacks and Promises, Explained

JavaScript Events: Clicks, Input and Listeners

Prompt Injection: The #1 Security Risk for AI Apps

JavaScript Objects: Properties, Methods and this

The JavaScript DOM: Select and Change the Page

JavaScript map, filter and reduce, Explained

Browse by topic

Python

Web Development

AI & Machine Learning

DevOps & Cloud

Computer Science

News & Trends

Never miss a decode.

Decode the logic behind the tech.

WhatsApp Usernames Are Here: Hide Your Number

Latest articles

JavaScript Callbacks and Promises, Explained

JavaScript Events: Clicks, Input and Listeners

Prompt Injection: The #1 Security Risk for AI Apps

JavaScript Objects: Properties, Methods and this

The JavaScript DOM: Select and Change the Page

JavaScript map, filter and reduce, Explained

Browse by topic

Python

Web Development

AI & Machine Learning

DevOps & Cloud

Computer Science

News & Trends

Never miss a decode.