Скачать или смотреть Converting jQuery AJAX Requests to Pure JavaScript: A Step-By-Step Guide

Learn how to convert jQuery AJAX requests to pure JavaScript using XMLHttpRequest for a simpler, more efficient approach.
---
This video is based on the question https://stackoverflow.com/q/65520840/ asked by the user 'Maksym' ( https://stackoverflow.com/u/14671022/ ) and on the answer https://stackoverflow.com/a/65528449/ provided by the user 'Darshan Chavda' ( https://stackoverflow.com/u/12586546/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to convert ajax request from jQuery pure js?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Converting jQuery AJAX Requests to Pure JavaScript

In the world of web development, AJAX (Asynchronous JavaScript and XML) is a critical component that allows web applications to send and retrieve data asynchronously without interfering with the display of the existing page. However, many developers often lean towards jQuery for handling AJAX requests, which can lead to over-reliance on this library. If you're looking to streamline your application and reduce dependencies, learning how to convert jQuery AJAX requests into pure JavaScript is a skill worth acquiring.

The Problem

A common scenario faced by many developers is needing to convert an existing jQuery AJAX request to a pure JavaScript implementation. For instance, consider the following jQuery AJAX request that submits an email form after a user has filled it out:

[[See Video to Reveal this Text or Code Snippet]]

While jQuery simplifies this process, understanding how to achieve the same functionality utilizing the native XMLHttpRequest object can enhance your ability to write cleaner, more efficient code without relying on libraries.

The Solution

To convert the jQuery AJAX request into pure JavaScript, follow these steps:

Step 1: Initialize an AJAX request using XMLHttpRequest

The first step is to create a new instance of XMLHttpRequest, which allows you to interact with servers via AJAX.

Step 2: Set up the event listener for form submission

Instead of jQuery's .on() method, you can use the native JavaScript addEventListener() method to handle the form submission and prevent the default form action.

Step 3: Configure the AJAX Request

You will need to open the request and set any necessary headers, such as Content-Type.

Step 4: Send the Request

Finally, send the data as a JSON string to the server.

Here’s how the complete converted code looks:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

Converting jQuery AJAX requests to pure JavaScript not solely reduces dependencies but also boosts your code performance. By leveraging the native XMLHttpRequest object, you harness a deeper understanding of how web requests are handled, enabling you to write cleaner and more maintainable code.

Now, you're equipped to tackle AJAX requests with pure JavaScript. Happy coding!