Pass jsp variable to javascript

Question

I am curious as to how I should be passing a variable from my .jsp page to my JavaScript file. Currently I have the following...

<c:forEach items="${stats}" var="s" >
        <script type="text/javascript">
            var status = "hello";
        </script>
            <div class='memory' id='memory'>
                <p id='text'>Memory<p>
            </div>
            <div class='memory1' id='memory1'>
                <p id='text'> Memory 2</p>
            </div>  
             <script  src="js/temp.js" type="text/javascript"></script>
        </c:forEach>

This works just fine for alert(status); However I am wondering how I should go about passing the field of {$s.status} to the javascript file as changing

<script type="text/javascript">
    var status = {$s.status};
</script>

does not work

You mean dynamically change with the server value? ,,, then that is not possible unless it either gets pushed to the client/browser, or the client asks for it, using e.g. an Ajax call. — Asons
– Asons, Commented Jul 9, 2018 at 14:22
the idea is yes the value will be changing as per a defined refresh rate. I am retrieving statistics about another running application such as memory used and status, and need to draw a progress bar on the screen. I am wondering then what the best way would be to go about this as it sounds like the way I originally wanted is a bit convoluted... — j-money
– j-money, Commented Jul 9, 2018 at 19:15
Ok, so what I suggested is a couple ways, and yet another is websockets, but again, which is based on how/what your are going to do. — Asons
– Asons, Commented Jul 9, 2018 at 19:18

Sunderam Dubey · Accepted Answer · 2022-06-16 12:08:00Z

3

Another way to do it:

<input type="hidden" value="${s.status}" id="status">
<script>
   var status = document.getElementById('status').value;
</script>

edited Jun 16, 2022 at 12:08

Sunderam Dubey

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answered Jul 9, 2018 at 14:38

Quang Dat Pham

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Comments

Sunderam Dubey · Accepted Answer · 2022-06-16 12:08:09Z

0

The best way to do it is to use something like:

var status = '${s.status}';

edited Jun 16, 2022 at 12:08

Sunderam Dubey

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answered Jul 9, 2018 at 14:25

Akash Srivastava

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Comments

Sunderam Dubey · Accepted Answer · 2022-06-16 12:08:55Z

0

Try this:

var test = <%=request.getParameter("test")%>;

edited Jun 16, 2022 at 12:08

Sunderam Dubey

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answered Jun 15, 2022 at 15:54

Mychelrenno

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