What is this?
Day.js is a minimalist JavaScript library for parsing, validating, manipulating, and displaying dates and times, built as a lightweight alternative to Moment.js.
Day.js is a minimalist JavaScript library for parsing, validating, manipulating, and displaying dates and times, built as a lightweight alternative to Moment.js.Is this a drop-in replacement for Moment.js or something different?It's a library with a largely Moment.js-compatible API, so if you already know Moment.js you already know how to use Day.js, but it's not the same codebase.
It's a library with a largely Moment.js-compatible API, so if you already know Moment.js you already know how to use Day.js, but it's not the same codebase.How do I add it to a project?Install it via your package manager (e.g. npm) and import Day.js into your code; a dedicated installation guide is linked from the docs site.
Install it via your package manager (e.g. npm) and import Day.js into your code; a dedicated installation guide is linked from the docs site.Do I need any extra setup to use locales or extra features?Locales and extended features are opt-in plugins/modules that are not bundled by default, so you load only what you need to keep the footprint small.
Locales and extended features are opt-in plugins/modules that are not bundled by default, so you load only what you need to keep the footprint small.What don't I get out of the box?The core bundle intentionally excludes i18n locales and extra functionality; you must add plugins explicitly to extend Day.js beyond its minimal core.
The core bundle intentionally excludes i18n locales and extra functionality; you must add plugins explicitly to extend Day.js beyond its minimal core.Does it work in all browsers, or just modern ones?Day.js is designed for modern browsers and the README states all browsers are supported.
Day.js is designed for modern browsers and the README states all browsers are supported.How big is Day.js compared to Moment.js?Day.js is only about 2kB minified and gzipped, much smaller than Moment.js, while keeping a similar API.
Day.js is only about 2kB minified and gzipped, much smaller than Moment.js, while keeping a similar API.Is Day.js mutable like some date libraries?No, Day.js objects are immutable; every manipulation returns a new instance instead of modifying the original.
No, Day.js objects are immutable; every manipulation returns a new instance instead of modifying the original.Can I chain date operations?Yes, Day.js methods are chainable, so you can combine multiple manipulations in a single expression.
Yes, Day.js methods are chainable, so you can combine multiple manipulations in a single expression.Which languages does Day.js support out of the box?The README itself is translated into English, Chinese, Japanese, Portuguese, Korean, Spanish, Russian, Turkish, Sinhala, and Hebrew, and Day.js ships i18n plugins for localized date formatting.
The README itself is translated into English, Chinese, Japanese, Portuguese, Korean, Spanish, Russian, Turkish, Sinhala, and Hebrew, and Day.js ships i18n plugins for localized date formatting.What are similar projects?luxon, date-fns, flatpickr, react-i18next, formatjs, awesome-falsehood, classnames, react-dates
luxon, date-fns, flatpickr, react-i18next, formatjs, awesome-falsehood, classnames, react-datesWhich topics is it in?time, date, internationalization, localization, lightweight, i18n, utility, npm, frontend, nodejs, library, typescript
time, date, internationalization, localization, lightweight, i18n, utility, npm, frontend, nodejs, library, typescript