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.

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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 programmer refreshing your skills, start with the most useful tips our dev community members recommend and build on solid, well-tested coding knowledge.

JavaScript tips that stick

Testing for numeric values in javascript

Angular Services and Useable Patterns

Share utilities with anyone via npm + git

Don't use append inside loops

Extending Javascript's Array

Autoreload for nodejs files

javascript string replace

Use backslashes to span strings across multiple lines

Handle CSV data in JavaScript

Best Way to Override Default Configs using jQuery

jQuery mk-js toasty plugin

ES6 Destructuring Assignment

Convert clipboard contents from Javascript to Coffeescript

Jam - JavaScript package management for the browser

Default text in form inputs for old browsers

The Power of Functional Programming

Track link clicks in Google Analytics

FindBrowser

Remove falsy values from array

Integration tests for keyboard accelerators

Sometimes you've gotta forgo npm for a module on GitHub that really works.

jQuery Bookmarklets

Redux Single Selection

A simple Backbone muck-up subview implementation

Wrap 3rd party tracking code

Awesome Jobs

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