@antv/scale/src/utils/choose-mask.ts

Toolkit for mapping abstract data into visual representation.

import { IntervalMap } from './time-interval';

export function chooseNiceTimeMask(date: Date, intervalMap: IntervalMap): string {
  const { second, minute, hour, day, week, month, year } = intervalMap;
  if (second.floor(date) < date) return '.SSS';
  if (minute.floor(date) < date) return ':ss';
  if (hour.floor(date) < date) return 'hh:mm';
  if (day.floor(date) < date) return 'hh A';
  if (month.floor(date) < date) {
    if (week.floor(date) < date) return 'MMM DD';
    return 'ddd DD';
  }
  if (year.floor(date) < date) return 'MMMM';
  return 'YYYY';
}