Question 185536 in Javascript Question posted in
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Javascript – getting the date in US format

I have this kind of code where I only get month and year

dates are coming as : "6 2023"

let checkCurrentDate = new Date().getMonth() + 1 + ' ' + new Date().getFullYear();
console.log(checkCurrentDate);

I want the date to be in mm/dd/yyyy format. Also, in some cases, dates are coming as "June 2023" and I need the date in the same mm/dd/yyyy format. Please guide what I am missing here .

The dd should be the first of every month .

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2

Answers


  1. 0

    There are two ways to format a date a string in English US format.

    1. Using a reusable formatter instance Intl.DateTimeFormat
    2. Calling toLocaleDateString
    const dateFormatter = new Intl.DateTimeFormat('en-US');

// Reusable formatter
console.log(dateFormatter.format(new Date()));

// Inline locale string
console.log(new Date().toLocaleDateString('en-US'));

    If you want padding, you need to specify 2-digit as an option for month and day.

    Note: Don’t forget the year!

    const dateFormatter = new Intl.DateTimeFormat('en-US', {
  month: '2-digit',
  day: '2-digit',
  year: 'numeric'
});

// Reusable formatter
console.log(dateFormatter.format(new Date()));

// Inline locale string
console.log(new Date().toLocaleDateString('en-US', {
  month: '2-digit',
  day: '2-digit',
  year: 'numeric'
}));

    Now, to put it all together:

    const dateFormatter = new Intl.DateTimeFormat('en-US', {
  month: '2-digit',
  day: '2-digit',
  year: 'numeric'
});

const parseDate = (dateStr) => {
  const tokens = dateStr.split(/s/g); // <MONTH_INDEX|MONTH_NAME> <YEAR>
  if (tokens.length !== 2) throw new Error(`Illegal date format: ${dateStr}`)
  return !isNaN(dateStr[1])
    ? new Date(+tokens[1], +tokens[0] - 1, 1)               // Numeric month
    : new Date(Date.parse(`${tokens[0]} 1, ${tokens[1]}`)); // Month name
};

['6 2023', 'June 2023', 'foobar'].forEach((dateStr) => {
  try {
    console.log(dateFormatter.format(parseDate(dateStr)));
  } catch (e) {
    console.log(e.message);
  }
});

    Output

    06/01/2023
06/01/2023

    Here is a better version that is more efficient at parsing the month name. All the months for the en-US are generated ahead of time.

    const getLocalMonthNames = (locale = 'default', format = 'long') =>
  Array.from({ length: 12 }, (_, monthIndex) =>
    new Date(0, monthIndex, 1).toLocaleString(locale, { month: format }));

const monthNames = getLocalMonthNames('en-US');
const dateFormatter = new Intl.DateTimeFormat('en-US', {
  month: '2-digit',
  day: '2-digit',
  year: 'numeric'
});

const parseDate = (dateStr) => {
  const tokens = dateStr.split(/s/g); // <MONTH_INDEX|MONTH_NAME> <YEAR>
  if (tokens.length !== 2) throw new Error(`Illegal date format: ${dateStr}`);
  const monthIndex = !isNaN(dateStr[1])
    ? +tokens[0] - 1                   // Numeric month
    : monthNames.indexOf(tokens[0]);   // Month name
  return new Date(+tokens[1], monthIndex, 1);                            
};

['6 2023', 'June 2023', 'foobar'].forEach((dateStr) => {
  try {
    console.log(dateFormatter.format(parseDate(dateStr)));
  } catch (e) {
    console.log(e.message);
  }
});
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  2. 0

    I’d suggest checking the documentation first before asking a question here.
    I understand that working with dates might be tricky, but all your answers could be found here

    Alternatively, you could use packages like moment or dayjs

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