The Hidden object represents a hidden input field in an HTML form (this input field is invisible for the user).
With this element you can send hidden form data to a server.
For each <input type="hidden"> tag in an HTML form, a Hidden object is created.
You can access a hidden input field by searching through the elements[] array of the form, or by using document.getElementById().
W3C: W3C Standard.
The Hidden object also supports the standard properties, methods, and events.
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