How to set a value for a span using jQuery

You're looking for the wrong selector id:

 $("#submitter").text(submitter_name);

should be

 $("#submittername").text(submitter_name);

You are using jQuery(document).ready(function($) {} means here you are using jQuery instead of $. So to resolve your issue use following code.

jQuery("#submittername").text(submitter_name);

This will resolve your problem.

You can do:

$("#submittername").text("testing");

$("#submittername").html("testing <b>1 2 3</b>");

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