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Programming tutorials for people who want code that actually runs, not code that only looks right. Pick a language, start at the beginning, and don't skip the basics. They are where most problems come from.

Any category Programming15 JavaScript 2 TypeScript 2 HTML and CSS 11
Any topics APIs and Integrations 7 Automation and Scripting 3 Data Structures and Algorithms 2 Databases 11 Deployment and Containers 3 Object-Oriented Programming 3 Packaging and Dependencies 5 Performance Optimization 21 Programming Patterns 10 Testing and Debugging 9 Type Systems 14 Web Development 15
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Audit Contrast and Focus Paths Before You Ship

Measure contrast by number, run axe, and walk the keyboard focus path with a script to catch what the tool cannot see.

3 min read
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Augment Express Request Without Fighting the Compiler

Add a user property to the Express request type with a module augmentation in one declaration file. After this, middleware and handlers agree on the type and you avoid the mistake that floods node_modules with errors.

5 min read
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Template Literal Types for /users/:id Routes

Turn a route pattern into a type that finds the parameter names and checks the paths you pass. After this, a typo in a route or a missing parameter is a compile error.

5 min read