Questions about Ajax data filling forms

Ajax requests data from the server through the client Ajax and fills it in the DOM. the filled data is: & lt; input & nbsp; type = "text" & nbsp; name = "info" & nbsp;/& gt; // if the data obtained from the ajax request is to be submitted, the value of info cannot be obtained. why? Ajax data filling forms
The client Ajax requests the server's data and fills it in the DOM. the filled data is:
// Ajax request data

If you want to submit a form and cannot obtain the value of info, why?
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