louis-aime/calendrical-javascript

Routines for computations on calendars. Extend Date and Intl.DateTimeFormat. Allow custom calendars. Add historical gregorian calendars with custom switching date. Specify date in custom calendar. Helps creating calendars for Ecma TC39's Temporal. Handle week figures. Enhance Intl.DateTimeFormat. Extend Unicode CLDR and ICUs.

calendrical-javascript's Issues

Make module usable in a various environments

Stage 1: ES script available to ordinary scripting, using import ("Chronos.js"); the importing file does not need to be a module.

Stage 2: check whether alternate code testing the environment can help using Node.js.

Stage 3: use pldr as a file opened with XMLHttpRequest, which is a similar synchronization problem as importing Chronos.

Test user should specify a date of switching to Gregorian

Ideally: one of the calendar is "historic", but this calendar can be changed by the user.

Use Map or WeakMap object to enhance computing of calendar fields

WeakMap should keep results in memory, when invoking .year then .month then .day of the same date. To be tried out.

Time part direction for rtl languages

Changing ":" to any ltr string e.g. " h " or " min " in rtl language context causes last part of time section to go to the right end of the formatted string. Proposed solution: insert direction indicators in string; these should be inserted in the "pldr" file, the only one that holds characters outside ANSI. Later on, these strings could be language specific.

All basic calendars should use ExtDate, not Date

At present, only WesternCalendar still uses Date for the switching-to-Gregorian date. ExtDate would be more flexible.

Set date from week fields

Enhance WeekClock as to specify a date in weeks following the calendar's specifications:

• CharacteristicDay(year) is a method provided by the calendar (or a function passed to the class)
• Year is not a parameter, is is computed with the calendar's normal routines
• setFromWeekFields enables it to set the day from the fields elements. It works with all types of calendars.

A special branche to be designed for this

ExtDateTimeFormat: options input object is changed

The options input parameter to ExtDateTimeFormat is changed after instantiation. I believe this is because Intl.DateTimeFormat does the same. To be investigated.