TLDR
HolidayPirates GmbH used moment.js to transform and manipulate dates in its frontend app. The company decided to use a new version of the library called dayjs. The dayjs provides a plugin called 'Advanced Format' which extends the capabilities of dayjs to extend the capabilities. Dayjs is very much immutable & tree shakable and its instance does not mutate the behavior of other instances. We had to de the following every time we used the dayjs: Initialization with a format was not possible: Locale assignment has to be done every time you import a module.via the TL;DR App
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