JavaScript date handling: From Date to Temporal
This video summarizes common practical problems with JavaScript's Date object and explains the design philosophy and three basic types (Instant, PlainDate, and ZonedDateTime) of the new API "Temporal," which was standardized over approximately nine years.
This introductory video for web engineers covers everything from immediate implementation using polyfills, to practical usage examples and considerations for production deployment.
━━━━━━━━━━━━━━━━━━━━━━
📋 Table of Contents
━━━━━━━━━━━━━━━━━━━━━━
00:00 Opening: Why Date causes problems
00:17 Note: Temporal is still an experimental feature
00:35 Goal of this video
00:47 Date is based on a 1995 design
01:00 Problem 1: Date is mutable
01:14 Problem 2: Parsing can easily become ambiguous
01:32 Problem 3: Month calculations deviate from intuition
01:49 Limitations of the library era
02:02 Temporal was standardized over 9 years
02:21 Design philosophy of Temporal
02:32 Temporal is a "namespace"
02:47 The three types of Temporal to remember first
02:59 Types used for supplementary purposes (PlainTime/PlainDateTime/Duration)
03:15 PlainDate for due dates and birthdays
03:29 Instant for saving time
03:44 ZonedDateTime for display
03:59 Immutable, making it easier to avoid side effects
04:11 Things to check before implementation
04:29 Can be tried with a polyfill (@js-temporal/polyfill)
04:50 Assuming it will not be implemented globally
05:05 Lightweight option (temporal-polyfill)
05:19 Differentiating usage in practice
05:35 Summary
05:52 Ending
━━━━━━━━━━━━━━━━━━━━━━
📚 Sources and Reference Links
━━━━━━━━━━━━━━━━━━━━━━
• GIGAZINE "The 9-Year Journey to the Birth of the Temporal Object, which Revolutionizes the Concept of Dates in JavaScript"
https://gigazine.net/news/20260429-fi...
• MDN Web Docs "Temporal - JavaScript"
https://developer.mozilla.org/ja/docs...
• MDN Web Docs "Date.parse() - JavaScript"
https://developer.mozilla.org/en-US/d...
• Bloomberg JS Blog "Temporal: The 9-Year Journey to Fix Time in JavaScript"
https://bloomberg.github.io/js-blog/p...
• Igalia "Temporal Reaches Stage 4"
https://www.igalia.com/2026/03/13/Tem...
• TC39 Temporal documentation
https://tc39.es/proposal-temporal/docs/
• TC39 Temporal proposal draft
https://tc39.es/proposal-temporal/
━━━━━━━━━━━━━━━━━━━━━━
🎤 Credits
━━━━━━━━━━━━━━━━━━━━━━
Narration: VOICEVOX (Kasugabe Tsumugi)
#JavaScript #Temporal #WebDevelopment #Frontend #Programming #ES2026 #TC39 #DateProcessing #API #NodeJS #Polyfill #TechnicalExplanation #TimeZone #Coding #Engineer
Nesta página do site você pode assistir ao vídeo on-line JavaScript date handling: From Date to Temporal duração hora minuto segundo em boa qualidade , que foi baixado pelo usuário テックニュース@ATI 08 Maio 2026, compartilhe o link com seus amigos e conhecidos, no youtube este vídeo já foi visto 236 vezes e gostou 10 espectadores. Boa visualização!
