Expected HTML source:

<form id="it" name="it" method="post" action="/test-jsf/test.xhtml" enctype="application/x-www-form-urlencoded" style="font-size:8px;">

Actual HTML source:

<form id="it" name="it" method="post" action="/test-jsf/test.xhtml">

The issue happens on the following conditions:

• The javax.faces.FACELETS_REFRESH_PERIOD parameter is used on web.xml

  <context-param>
    <param-name>javax.faces.FACELETS_REFRESH_PERIOD</param-name>
    <param-value>1</param-value>
  </context-param>

• The "h:form" tag has a "style" attribute and the "h:commandButton" tag is used as page update.

  <h:form id="it" style="font-size:8px;">
      <div class="container">
          <div class="form-group">
              <h:commandButton id="test01" value="Click Here"
                               actionListener="#{testBean.testFunc}" />
              <h:panelGrid columns="4" cellpadding="5" class="ui-grid"
                           style="width:1200px;">
                  <h:outputText value="TEST STRINGS." /><br/>
              </h:panelGrid>
          </div>
      </div>
  </h:form>
  

• The form attribute(style, enctype and etc..) are lost when the "h:commandButton" tag is executed over three times.