Convert a dd/mm/yyyy string to a Date in JavaScript

There are a few different ways to convert a string in the format dd/mm/yyyy to a Date object in JavaScript. Here are a few options to consider.

Approach 1: Split the String and Use the Date Constructor

One approach is to split the string into its component parts (day, month, and year) and use those parts to construct a Date object manually. Here’s an example of how to do this:

const str = '22/04/2022';const [day, month, year] = str.split('/');const date = new Date(+year, month - 1, +day);console.log(date); // Fri Apr 22 2022

This approach gives you more control over the process, but it requires more code and may be more prone to errors (e.g. if the string is in the wrong format or if the date is invalid).

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Approach 2: Split the String and Use the Date.parse Method

Another option is to split the string into its component parts and use the Date.parse method to convert them to a timestamp. Here’s an example of how to do this:

const str = '22/04/2022';const [day, month, year] = str.split('/');const timestamp = Date.parse(`${year}-${month}-${day}`);const date = new Date(timestamp);console.log(date); // Fri Apr 22 2022

Like the Date constructor, the Date.parse method has some limitations. It also expects the string to be in a specific format, and it may produce different results across different browsers.

Approach 3: Use a Regular Expression to Extract the Date Components

If you want to use a regular expression to extract the date components from the string, you can use the following code:

const str = '22/04/2022';const match = str.match(/(\d+)\/(\d+)\/(\d+)/);const day = match[1];const month = match[2];const year = match[3];const date = new Date(+year, month - 1, +day);console.log(date); // Fri Apr 22 2022

Approach 4: Use a Date Library or Utility Function

Using a date library or utility function can be a convenient way to handle string-to-date conversion in JavaScript, especially if you need to do it frequently or if you need to support different date formats. Here are a few more examples of libraries and utility functions you can use for this purpose:

moment.js

The moment.js library is a popular and widely-used library for working with dates and times in JavaScript. It provides a number of methods for parsing, formatting, and manipulating dates. Here’s an example of how to use moment.js to convert a dd/mm/yyyy string to a Date object:

const str = '22/04/2022';const date = moment(str, 'DD/MM/YYYY').toDate();console.log(date); // Fri Apr 22 2022

date-fns

date-fns is another popular library for working with dates in JavaScript. It provides a comprehensive set of functions for parsing, formatting, and manipulating dates, and it has a lightweight and modular design. Here’s an example of how to use date-fns to convert a dd/mm/yyyy string to a Date object:

const str = '22/04/2022';const date = parse(str, 'dd/MM/yyyy', new Date());console.log(date); // Fri Apr 22 2022

Utility Function

You can also create your own utility function to handle string-to-date conversion in a way that suits your specific needs. Here’s an example of a utility function that uses the Date constructor to convert a dd/mm/yyyy string to a Date object:

function stringToDate(str) {  const [day, month, year] = str.split('/');  return new Date(+year, month - 1, +day);}const date = stringToDate('22/04/2022');console.log(date); // Fri Apr 22 2022