How Can I Serialize Form Data in JavaScript Without Frameworks?

Form Serialization in JavaScript (Without Frameworks)

The challenge is presented: how to serialize a form in JavaScript without relying on external libraries or frameworks. Does JavaScript itself offer a way to convert form data into a serialized string? Let's explore the options.

Answer:

A valuable addition to JavaScript in 2023 is the FormData object. It provides a convenient method to serialize form data for both GET and POST requests:

<code class="javascript">const form = document.querySelector('form');
const formDataObj = new FormData(form);
const request = new XMLHttpRequest();
request.send(formDataObj);</code>

This approach ensures that the serialized data is sent as content type "multipart/form-data"; however, note that it is tailored towards POST requests. For GET requests, URLSearchParams might be more suitable.

Additional Information:

If backward compatibility is not a concern, alternative browser APIs like fetch() can provide even more streamlined functionality for form submissions. Nevertheless, the FormData approach remains a robust solution for simple form serialization needs.

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