tapestry-core/src/test/app1/HiddenDemo.tml

<t:border xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd"
          xmlns:p="tapestry:parameter">
    <h1>Hidden Demo</h1>

    <p>
        <t:pagelink page="hiddendemo" context="12345">setup</t:pagelink>
    </p>

    <t:if test="stored">

        <t:form t:id="form">
            <t:hidden t:id="stored"/>
            <input type="submit" value="Submit"/>
        </t:form>

    </t:if>


</t:border>