JSTL <c:remove> Core Tag

<c:remove> tag is used for removing an attribute from a specified scope or from all scopes (page, request, session and application).

Example

In the below example, first I have set two variables using <c:set> tag and then I have removed one of them using <c:remove> tag. As you can see in the output screenshot – when I tried to display both the variables, for the second attribute the page didn’t get any value and printed the default value using default attribute of <c:out> tag.

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<title>Example of c:remove tag</title>
</head>
<body>
<c:set var="Site" scope="session" value="BeginnersBook.com"/>
<c:set var="author" scope="session" value="Chaitanya"/>
<c:remove var="author"/>
<a href="display.jsp">check attributes</a>
</body>
</html>

display.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<c:out value="${Site}"/><br>
<c:out value="${author}" default="Attribute has no value"/>

Scope attribute of <c:remove> tag

Above we have coded like this

<c:remove var="author"/>

This above code removes an attribute from all the scopes (page, session, application, request). In order to be specific we must need to specify the scope attribute inside <c:remove> tag, like I did below – The below JSTL statement will remove the variable var from session scope.

<c:remove var="author" scope="session"/>