https://jtypes.com/Practical JavaScript and TypeScript tools, with notes on what they can and cannot tell you. Start with a JSON sample.https://jtypes.com/guides/format-json-without-changing-data/https://jtypes.com/guides/format-json-without-changing-data/Format a JSON response with JavaScript, handle invalid input and spot cases where parsing can lose information.Wed, 21 Oct 2026 00:00:00 GMThttps://jtypes.com/guides/typescript-narrowing-and-satisfies/https://jtypes.com/guides/typescript-narrowing-and-satisfies/Use runtime guards to narrow uncertain values and satisfies to check configurations without confusing the two.Wed, 21 Oct 2026 00:00:00 GMThttps://jtypes.com/guides/format-dates-with-explicit-time-zones/https://jtypes.com/guides/format-dates-with-explicit-time-zones/Show one JavaScript timestamp in London and Paris, keep UTC output separate and test seasonal differences.Wed, 21 Oct 2026 00:00:00 GMT