An Introduction to the JavaScript Temporal API

JavaScript Temporal API: The Revolution of Date Processing

JavaScript's Date() object has long been criticized, with limitations including lack of support for the non-Gregorian calendar, unpredictable daylight saving behavior, and unreliable string date parsing. And the new Temporal API is a modern alternative that has been created to solve these problems.

Advantages of Temporal API:

• Predictable cross-browser/runtime behavior: Ensure consistency in different environments.
• Simplified date and time calculation API: Easier to use and understand.
• Support all time zones and non-Gregorian calendars: Extends the scope of date processing.
• Strict ISO-8601 string parsing: Avoid ambiguity and errors.
• Immutable Object: Improves the reliability and maintainability of the code.

Temporal object type:

Temporal provides a variety of objects to handle different aspects of time:

• Temporal.Instant: The exact moment of time.
• Temporal.ZonedDateTime: Represents the date and time with time zone and calendar information.
• Temporal.PlainDate and Temporal.PlainTime: respectively represent dates and times that are not related to the time zone.
• Temporal.PlainYearMonth and Temporal.PlainMonthDay: Denote dates that do not contain date and year information, respectively.

Main functions:

Temporal API supports the extraction, comparison and sorting of date values, date calculations, and date formatting using the international API. It should be noted that the API is still in the second phase of the TC39 standard approval process and may change before final release.

Comparison between

and Date() objects:

Date() The object's shortcomings are:

• Only support UTC and user local time.
• The Fragrignactic calendar is not supported.
• Daystorical time behavior is unpredictable.
• String date parsing is unreliable.
• API uses clumsy.
• Objects are variable.

Alternatives to Moment.js:

While Moment.js was once a popular alternative, it is currently in maintenance mode and is not recommended for use in new projects.

Temporal's core objectives:

• Predictable cross-browser/runtime behavior.
• Easier Date and Time Calculation API.
• Support the Fragrulian calendar.
• Support all time zones, including daylight saving time calculations.
• Strict ISO-8601 string parsing.
• All objects are immutable.

Example: Get the current date and time, create date and time objects, date comparison, calculation and formatting, etc. Please refer to the code example in the original text.

Summary:

Temporal API is expected to completely change the way JavaScript date processing is processed, providing developers with more powerful and reliable tools. Although it is still in the development stage, it has great potential and is worth paying attention to and looking forward to.

FAQs:

(The FAQs part in the original text is omitted here because the article is long, but its content is covered in the above paragraphs.)

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