How to Emulate a Readonly Attribute for an HTML SELECT Tag and Still Retrieve POST Data?

Emulating Readonly Attribute for HTML SELECT Tag with POST Data Retrieval

According to HTML specifications, the SELECT tag lacks a readonly attribute, which necessitates the use of the disabled attribute to prevent user input changes. However, this poses an issue as disabled inputs are excluded from POST or GET data submissions.

To address this challenge, a workaround is to maintain the disabled attribute for the SELECT element while adding a hidden input with the same name and value.

Solution:

1. Initialize the SELECT element as disabled.
2. Add a hidden input with the same name and value as the SELECT element.
3. If the SELECT element is reenabled, transfer its value to the hidden input using an onchange event. Subsequently, disable or remove the hidden input.

Implementation:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
    <form>

Code Explanation:

• The form contains a disabled SELECT element and a hidden input for animal selection.
• When the "Enable" button is clicked, the SELECT element is enabled and its name is set to "animal." The hidden input is disabled to prevent duplicate submission.
• An onchange event transfers the updated SELECT element value to the hidden input when reenabled.
• The form submission displays the submitted form data, which includes both the color selection from the second SELECT element and the animal selection from the hidden input.

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