read-excel-file/modules/types/Date.js

Read small to medium `*.xlsx` files in a browser or Node.js. Parse to JSON with a strict schema.

import parseDate from '../read/parseDate.js';
import InvalidError from './InvalidError.js';
export default function DateType(value, _ref) {
  var properties = _ref.properties;
  // XLSX has no specific format for dates.
  // Sometimes a date can be heuristically detected.
  // https://github.com/catamphetamine/read-excel-file/issues/3#issuecomment-395770777
  if (value instanceof Date) {
    if (isNaN(value.valueOf())) {
      throw new InvalidError('out_of_bounds');
    }
    return value;
  }
  if (typeof value === 'number') {
    if (isNaN(value)) {
      throw new InvalidError('invalid_number');
    }
    if (!isFinite(value)) {
      throw new InvalidError('out_of_bounds');
    }
    var date = parseDate(value, properties);
    if (isNaN(date.valueOf())) {
      throw new InvalidError('out_of_bounds');
    }
    return date;
  }
  throw new InvalidError('not_a_date');
}
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