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Quick references
Small, practical tips for terminal work, Git, JavaScript, APIs, CSS, accessibility, and more. Code examples are for you to review and run in your own environment; LeafDeft never executes submitted code.
Keep code review prompts focused, scoped, and free of credentials or production data.
Use ss to inspect listening TCP sockets and their owning processes.
Ask MySQL how it plans to execute a SELECT before changing indexes or query structure.
Make scalar parameter and return values reject unintended type coercion within this PHP file.
Keep keyboard focus obvious while avoiding a persistent outline on every pointer click.
List local branches that have already merged into your current branch before removing any refs.
Use the nullish coalescing operator when only null or undefined should trigger a default.
Print response headers without downloading a large response body.
Disable nonessential transitions for visitors who request reduced motion.