Скачать или смотреть Converting jQuery Ajax Form Data to Pure JavaScript

Learn how to effectively send form data using Pure JavaScript to achieve the same functionality as jQuery Ajax.
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Converting jQuery Ajax Form Data to Pure JavaScript: A Step-by-Step Guide

When working with Ajax requests, JavaScript provides various means to send form data to a server. However, many developers initially turn to libraries like jQuery due to their simplified syntax and functionality. But sometimes, it becomes essential to understand how to implement Ajax using only pure JavaScript. This guide will guide you through converting your jQuery Ajax form settings into pure JavaScript, focusing on how to correctly send form data.

Understanding the Problem

You may have encountered a situation where you're essentially required to replicate jQuery's Ajax functionality using only native JavaScript. One of the most common challenges arises when you attempt to send data to a server and you notice discrepancies between the way data is sent in jQuery versus pure JavaScript. This discrepancy is often due to the content type and how the data is structured before being sent.

Here's an example scenario:

Sending form data using jQuery works correctly.

Attempting the same through pure JavaScript yields errors or incorrect data formats.

Your goal is to figure out how to make the native JavaScript request behave in the same way as jQuery.

A Solution to the Problem

You need to ensure you're using the correct content type along with appropriately formatted request data. Here’s a breakdown of three different methods to send data using pure JavaScript similar to jQuery Ajax.

1. Sending JSON Data

If you want to send JSON data, you should set the Content-Type to application/json. Here's how you'd structure that:

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

2. Using FormData Object

If you're working with form data and want to retain the easy handling of the FormData object, you can use the following code:

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

3. Sending URL Encoded Data

If you want to send data as URL encoded (like a traditional form submission), you can create a URL parameter string. The code below demonstrates this method:

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

Summary of Key Points

Content-Type matters: Setting the correct Content-Type is critical for your server to understand the sent data.

Use JSON.stringify for JSON data: If you are sending JSON, it should be stringified.

FormData handles multipart uploads: Using FormData will automatically take care of the required headers if you're sending files or complex data forms.

Encoding data for URL parameters: Always use encodeURIComponent to avoid issues with special characters.

Conclusion

Converting jQuery Ajax form data settings to pure JavaScript requires a good understanding of how data is sent over the network and ensuring that the correct content type is specified. By following the methods outlined above, you can replicate the functionality of jQuery Ajax requests with pure JavaScript, empowering you to create more lightweight and efficient web applications.

With this guide, you should be well-equipped to handle Ajax requests using pure JavaScript. Happy coding!