react-day-picker
Version:
Customizable Date Picker for React
47 lines • 1.64 kB
JavaScript
import React from "react";
export function useMulti(props, dateLib) {
const { selected: initiallySelected, required, onSelect, mode } = props;
const [selected, setSelected] = React.useState(initiallySelected);
const { isSameDay } = dateLib;
// Update the selected date if the selected value from props changes.
React.useEffect(() => {
setSelected(initiallySelected);
}, [mode, initiallySelected]);
const isSelected = (date) => {
return selected?.some((d) => isSameDay(d, date)) ?? false;
};
const { min, max } = props;
const select = (triggerDate, modifiers, e) => {
let newDates = [...(selected ?? [])];
if (isSelected(triggerDate)) {
if (selected?.length === min) {
// Min value reached, do nothing
return;
}
if (required && selected?.length === 1) {
// Required value already selected do nothing
return;
}
newDates = selected?.filter((d) => !isSameDay(d, triggerDate));
}
else {
if (selected?.length === max) {
// Max value reached, reset the selection to date
newDates = [triggerDate];
}
else {
// Add the date to the selection
newDates = [...newDates, triggerDate];
}
}
onSelect?.(newDates, triggerDate, modifiers, e);
setSelected(newDates);
return newDates;
};
return {
selected,
select,
isSelected
};
}
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