How Can I Convert Custom Formatted Date Strings to JavaScript Date Objects?

Formatting Datetime Strings to Objects in JavaScript

When working with dates in JavaScript, it's necessary to convert them to datetime objects for increased functionality. This involves parsing the string formats into datetime objects.

Custom Formatting with Format Strings

For strings with custom formats that don't align with the default Date.parse() function, manual parsing is necessary. Utilize regular expressions to extract the individual components (day, month, year, hour, minute, and second) and create a new Date object by setting these values explicitly.

Implementation Example

Here's an example to convert a string using the provided format string:

function convertToDateTime(dateString, formatString) {
  const matches = dateString.match(/(\d+)\.(\d+)\.(\d+)\s+(\d+):(\d+):(\d+)/);
  if (!matches) throw new Error("Invalid date string format.");

  [ignore, day, month, year, hour, minute, second] = matches;

  return new Date(year, month - 1, day, hour, minute, second);
}

const dateTime = convertToDateTime("23.11.2009 12:34:56", "dd.MM.yyyy HH:mm:ss");

This approach provides flexibility in converting string to datetime objects with custom formats, allowing you to adapt it to your specific requirements.

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