Question

I have code:

<spring:hasBindErrors name="formTest">
    <c:forEach items="${errors.globalErrors}" var="error">
      <spring:message code="${error.code}" /><br/>
    </c:forEach>
</spring:hasBindErrors>

So I pass ${errors} from Spring.

How can I check in JavaScript whether errors exist not? I tried:

<script type="text/javascript">
    var NO_ERRORS = ${errors.errorCount? true :false};
</script>

But I always have: false (even if errors are exists)

I tried too:

<script type="text/javascript">
        var NO_ERRORS = <c:if test="{empty errors}">true</c:if><c:if test="{not empty errors}">false</c:if>;
    </script>

And: (here I always true)

<script type="text/javascript">
        var NO_ERRORS = ${empty errors? true :false};
    </script>

---

Ok I have:

<spring:hasBindErrors name="formModel">
            <c:set var="isError" value="${errors.errorCount == 0}" />
            <c:if test="${isError}">
            <script type="text/javascript">
                IS_ERRORS = false;
                </script>
            </c:if>
    </spring:hasBindErrors>

But it is wrong, because does not work this: <c:set var="isError" value="${errors.errorCount == 0}" /> if I change to <c:set var="isError" value="${errors.errorCount > 0}" /> is good, but why firstly solution does not work?

Answer 1

var NO_ERRORS = <c:if test="{empty errors}">true</c:if><c:if test="{not empty errors}">false</c:if>;

assuming you save errors only if error exists. Else you can check based on errors.errorCount==0 and errors.errorCount>0