JavaScript
Every article on the AldeaCode blog tagged with this topic.
Convert Unix Timestamp to Date: Avoid the Timezone Bug
Convert Unix timestamps to dates without timezone or seconds-vs-milliseconds bugs. Snippets for Bash, Python, PostgreSQL and Go.
Read article →Regex Lookahead and Lookbehind Explained with Examples
Learn regex lookahead and lookbehind in plain words: positive, negative, variable width, engine support and the practical patterns you actually need.
Read article →encodeURIComponent vs encodeURI: URL Encoding Cheatsheet
When to use encodeURIComponent vs encodeURI in JavaScript, plus reserved characters, the plus sign space bug and percent encoding rules that work.
Read article →How to Generate a UUID in JavaScript (2026 Guide)
Generate a UUID in JavaScript with crypto.randomUUID, no npm package needed. When to choose ULID, when to add salt, plus browser and Node.js examples.
Read article →What is the Web Crypto API: A Practical Guide
What the Web Crypto API is, what SubtleCrypto can do, when to use it and when to skip it. Key storage, limits and real footguns explained.
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