How to set the JSTL variable value through javascript variable [duplicate]

Question

I would like to display html code when the user clicks on a particular box.

When the user selects a value from one of the available options, a JavaScript function is invoked which stores the selected value against a variable.

I am having difficulty with implementing code to compare the value of EL variable with the innerHTML variable.

Below is the code I am currently using:

var groupid = parseInt($('#selectgroup').val());    

document.getElementById("facilityTable").innerHTML= "<c:forEach var='group' 

items='${groups}'>"+
"<c:if test='${group.key == (groupid)}'>"+

"<td>+Test+${group.value.groupName}</td>"+

"<td>${group.value.groupId}</td>" +                                                                                     

"</c:if>"+

"</c:forEach>";

Dave Newton · Accepted Answer · 2023-12-31 20:54:45Z

0

Your JSTL tags will not be a part of JS output, so there is not reason to put them into quotes, e.g.:

document.getElementById("facilityTable").innerHTML= ""
<c:forEach var='group' items='${groups}'>
  <c:if test='${group.key == (groupid)}'>
+ "<td>+Test+${group.value.groupName}</td>"+
"<td>${group.value.groupId}</td>"                                                                                     
  </c:if>
</c:forEach>;

edited Dec 31, 2023 at 20:54

Dave Newton

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answered Sep 2, 2013 at 13:31

udalmik

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3 Comments

Dinesh Maske Over a year ago

but can,t get groupid vaule in <c:if test='${group.key == (groupid)}'>.

Dinesh Maske Over a year ago

groupid variable is declare in javascript var groupid = $('#selectgroup').val();

udalmik Over a year ago

You can not use JS variables in JSTL EL expressions, because they are executed on the server before user gets result Html and JS starts execution. You can use JSTL to render groups as JS array. And then iterate through it using simple JS for loop.

Gautam Viradiya · Accepted Answer · 2015-03-02 05:40:23Z

-2

Set to jstl variable value using javascript

<script>
    function function1()
    { 
        <c:set var="temp" value=""/>
        temp="Hello";
        alert(temp);   
    }
</script>

answered Mar 2, 2015 at 5:40

Gautam Viradiya

5137 silver badges11 bronze badges

1 Comment

Dave Newton Over a year ago

There is no connection between the JSTL variable temp and the global JS variable temp here.

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