How to convert date to string in jquery

In front-end development, date processing is a common problem. When developing with jQuery, converting dates into strings is also a common requirement. This article will demonstrate how to convert dates into strings by introducing the jQuery datepicker plug-in.

1. jQuery datepicker

jQuery datepicker is a date picker plug-in that uses the style of jQuery UI and provides interactive functions for date selection. Using the jQuery datepicker plugin, you can easily select dates and format them into strings.

1. Install jQuery datepicker

First, you need to introduce the library files of jQuery and jQuery UI, as well as the library files of jQuery datepicker into the HTML page. The corresponding library files can be downloaded from the official website of jQuery (https://jquery.com/) and the official website of jQuery UI (https://jqueryui.com/). Or load using CDN.

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2. Use jQuery datepicker

To use jQuery datepicker, you only need to add a class to the date input box , and then call the datepicker function in JavaScript.

HTML code:

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JavaScript code:

$(document). ready(function(){

$(".datepicker").datepicker();

});

In this way, you can click on the date input box to pop up the date picker.

2. Convert date into string

Converting date into string mainly involves two processes: obtaining date and formatting into string.

1. Get the date

Using jQuery datepicker, you can get the date through a function. For example, to get the default date when the date picker pops up:

$(".datepicker").datepicker("getDate")

This function returns a JavaScript Date type object.

2. Format into a string

The Date type using JavaScript comes with some date formatting methods, including toDateString(), toLocaleDateString(), etc. But the disadvantage of these methods is that the format cannot be customized.

In order to format dates conveniently, we can use the third-party library moment.js (https://momentjs.com/), which provides a very convenient date processing method.

For example, if we want to format the date into the form of yyyy-mm-dd, we can use the format() method of moment.js.

moment(date).format("YYYY-MM-DD")

Among them, date is a JavaScript Date type object, representing the date to be formatted. The parameter of the format() method is a string used to specify the output format. YYYY represents the four-digit year, MM represents the month, and DD represents the number of days.

The complete code is as follows:

HTML code:

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JavaScript code:

$(document).ready( function(){

$(".datepicker").datepicker();
$("#btnConvert").click(function(){
    var date = $(".datepicker").datepicker("getDate");
    var dateString = moment(date).format("YYYY-MM-DD");
    $("#result").text(dateString);
});

});

First, the datepicker class is added for the date input box. Then, a button is defined to trigger the date conversion process. When the button is clicked, the getUserDate() function will get the date and use moment.js to format the date into a string.

3. Summary

Using the jQuery datepicker plug-in, you can quickly implement a date picker. Using moment.js, you can easily convert dates into strings and customize the date format. Through the explanation of this article, I believe everyone has a deeper understanding of how jQuery converts dates into strings.

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