JavaScript tips that stick
Language and browser tricks for apps that feel snappy.
Check all facebook friend in invite
Finding a string in a phone number
undefined object property
Map array of key/value pairs to a Javascript object
JavaScript で 配列を空にする
NaN !== NaN
everything is an * : javascript
Overriding the alert method.
Bitwise OR to drop decimals
Handlers Disorder
Welcome to Coderwall
shortest cross platform onReady document
not not (!!) Javascript
JS online sandbox
Hidden simplicity
JavaScript on a page runs with the privileges of that origin. One altered library, tag manager, or snippet can read inputs, change what people see, and call your APIs as the user.
Security insights from Cside
Coderwall Dev Community
Explore the all-time favorite tutorials, design patterns and engineering guides that thousands of readers keep sharing and coming back to, year after year.
These proven techniques, reusable code samples, programming tips and vibe coding habits earned their place through steady views and member likes.
Each entry here is still useful today, covering programming languages, frameworks and workflows that stay relevant long after they were first published.
Whether you're new to a tech stack or an experienced engineer refreshing your skills, start with the most useful tips our dev community members recommend and build on solid, well-tested coding knowledge.