How does this skill help with bundle size optimization?

It enforces modular, named imports rather than bulk imports. This allows build tools to tree-shake the library, ensuring you only include the specific code your application actually uses.

Why should I use parseISO instead of the native Date constructor?

The native Date constructor is inconsistent across different browsers when parsing strings. parseISO ensures reliable, standardized parsing of ISO 8601 strings across all environments.

Can I use this for internationalized applications?

Absolutely. It provides patterns for locale-aware formatting shortcuts (P, PP, PPP) that automatically adapt to regional conventions for users worldwide.

Why are pure functions important for date manipulation?

Pure functions return new Date objects instead of mutating the original input. This prevents accidental side effects and bugs in shared application state or UI component props.

Does this skill support modern timezone management?

Yes, it includes patterns for both @date-fns/tz (v4+) and date-fns-tz (v3.x), covering TZDate, UTCDate, and Daylight Saving Time handling.

TypeScript Date Utilities (date-fns)

Name: TypeScript Date Utilities (date-fns)
Author: agents-inc

byagents-inc

0•

開発者ツール

Streamlines date formatting, parsing, and manipulation in TypeScript using the modular and tree-shakeable date-fns library.

This skill provides a standardized framework for handling date and time operations within TypeScript projects using the date-fns ecosystem. It enforces best practices such as immutable date manipulation, safe ISO parsing, and efficient tree-shaking to keep bundle sizes small. Whether you are building complex calendars, handling multi-timezone scheduling, or simply formatting timestamps for local users, this utility ensures consistent, bug-free implementations across different environments while strictly avoiding common pitfalls like browser-inconsistent date parsing or accidental state mutation.

主な機能

01Immutable date arithmetic using pure functional patterns

02Advanced timezone support with @date-fns/tz and TZDate integration

03Modular imports for optimal tree-shaking and minimal bundle size

040 GitHub stars

05Safe ISO 8601 parsing to eliminate browser-specific inconsistencies

06Locale-aware formatting using standard Unicode TR35 tokens

ユースケース

01Managing complex cross-timezone event scheduling and UTC conversions in enterprise applications

02Implementing reliable date arithmetic for billing cycles, trials, and expiration logic

03Building localized calendar views and date pickers with custom week-start logic

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add agents-inc/skills web-utilities-date-fns

For use in Claude.ai and ChatGPT

主な機能

01Immutable date arithmetic using pure functional patterns

02Advanced timezone support with @date-fns/tz and TZDate integration

03Modular imports for optimal tree-shaking and minimal bundle size

040 GitHub stars

05Safe ISO 8601 parsing to eliminate browser-specific inconsistencies

06Locale-aware formatting using standard Unicode TR35 tokens

ユースケース

01Managing complex cross-timezone event scheduling and UTC conversions in enterprise applications

02Implementing reliable date arithmetic for billing cycles, trials, and expiration logic

03Building localized calendar views and date pickers with custom week-start logic

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add agents-inc/skills web-utilities-date-fns

For use in Claude.ai and ChatGPT