Small ECMAScript functions

date-tagged.mjs

/**
 * Create an UTC date object based on an ISO yyyy-mm-dd string
 */
export const toUTC = (input) => {
	const date = new Date(`${input}T00:00:00Z`);
	if (Number.isNaN(date.getDate())) {
		throw new Error(date);
	}
	return date;
};

/**
 * Tagged function to create a UTC date object
 */
export function utc() {
	const [input] = arguments;
	const trimmed = String(input).trim();
	return toUTC(trimmed);
}

i18n.ts

import { __ } from '<package with gettext __ function>';

/**
 * Tagged template function to normalizes whitespace for text we manage translation.
 *
 * - Removes newlines
 * - Collapses multiple spaces to single space
 * - Trims leading/trailing whitespace
 * - Pass to translation
 */
export const __t = (
  strings: TemplateStringsArray,
  ...values: unknown[]
): string => {
  // Interleave strings and values
  let result = strings[0];
  for (let i = 0; i < values.length; i++) {
    result += String(values[i]) + strings[i + 1];
  }

  // Normalize whitespace
  result = result
    // Replace newlines with space
    .replace(/\n/g, ' ')
    // Collapse multiple spaces
    .replace(/\s+/g, ' ')
    // Remove leading/trailing space
    .trim();

  return __(result);
}