SimpleTsDatePicker

Super simple but extensible datepicker

To get a simple idea about the default behavior check the demo: https://codesandbox.io/s/8nk47k5z29

Tooltip / Popover

The functionality of attaching to an textbox/input element is out of scope for this library. However it is fairly easy to render the component in a third-party tooltip lib, the following link gives and example with react-popover https://codesandbox.io/s/nk9nrn320m

Components

This repo is split up in a few different sections, first the components section: https://github.com/DJWassink/SimpleDatePicker/tree/master/src/components

Here are some stateless components which are each responsible for rendering a part of the datepicker,

1. abbreviations.tsx is responsible for rendering the abbreviations of easy weekday
2. day.tsx is responsible for redering a single cell in the datepicker, typically containing an number indicating the day of month.
3. header.tsx the default header contains two chevrons to navigate between the months and has two select dropdown to quickly navigate the months and 8 years up/down
4. stateless_datepicker.tsx is responsible for rendering each day.tsx in order of the passed matrix of dates, this component is the main container and gets passed the abbreviations, header and an function to render a single day.tsx

All of these components can be imported/overwritten to fit your needs. The most user friendly component is the statefull component called SimpleDatePicker which uses all these components to render a datepicker as can be seen here: https://codesandbox.io/s/8nk47k5z29 this component has the following props:

interface SimpleDatePickerProps {
    i18n?: I18n;
    value: Date;
    weekStart?: number;
    onChange: (value: Date) => void;

    renderHeader?: (i18n: I18n, screen: Date, onScreenChange: (screen: Date) => void) => JSX.Element;
    renderAbbreviations?: (i18n: I18n, weekStart: number) => JSX.Element;
    renderDay?: (
        day: Date,
        value: Date,
        screen: Date,
        cursor: Date,
        onClick: () => void,
        onMouseMove: () => void
    ) => JSX.Element;
}

As you can see the only required props are the value and onChange properties. The other props are used to customize the default behavior of the datepicker. The renderXXX props are used to be able to overwrite an existing part of the datepicker, an good example can be seen here: https://codesandbox.io/s/j35prx3nn9

Utils

The utils file contains a few utility functions which are used by the different components, the most noteworthy functions are the following:

1. generateMatrix = (date: Date, weekStart: number): Date[][] which generates a 7 (width) by 6 (height) matrix containing all the dates for a month, the date params indicates the month adn the weekStart is an number which indicates on which day a week starts (for example 1 means monday).
2. isInMatrix = (matrix: Date[][], date: Date): boolean simply check if the given day exists in the given matrix.
3. getFirstDayOfMonth = (date: Date): Date return a date which has the day set to the first day of the month given by the date paramter.
4. getFirstDayOfWeek = (date: Date, weekStart: number): Date returns the first day of a week, usefull in combination with getFirstDayOfMonth, if you first do the firstDayOfMonth and then this function you get the most to left date in the datepicker.

Of course there are a few more interesting functions, just see the code which do what and which are usefull.

i18n

It is possible to add your own translations, default we use the english translations which you can find in https://github.com/DJWassink/SimpleTsDatePicker/blob/master/src/i18n.ts, if you want your own translations simply copy the I18n const from that file and translate it. Then pass it as the i18n parameter to the datepicker component.