Utilizing Boolean Operators in JavaScript with Thymeleaf: A Guide

When incorporating Boolean conditions in JavaScript with Thymeleaf using th:inline="javascript", an exception is thrown which appears as follows: 

org.xml.sax.SAXParseException; lineNumber: 14; columnNumber: 22; The entity name must immediately follow the '&' in the entity reference.
com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:177)
com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:441)
com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:368)
com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1436)
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEntityReference(XMLDocumentFragmentScannerImpl.java:1845)
.............................

The provided JavaScript code snippet is displayed below: 

<script type="text/javascript" th:inline="javascript">
    $(document).ready(function(){
        $('.fancybox').fancybox({
            'width' :'623px',
            'maxHeight':'156px'
        });

        var catId = $("#category").val();
        if(catId != null && catId != ''){
            findSubCategories();
            /*<![CDATA[*/
                var subCatId = /*[[${searchProductDto.subCategory}]]*/
            /*]]>*/
            debugger;
            if(subCatId != null){
                $("#subCategory").val(subCatId);
            }
        }
    });
...............................

How can we properly use the & operator in Thymeleaf?

javajavascriptexceptionthymeleaf

Answer №1

Enclose the if statement within a <![CDATA[ section

<script type="text/javascript" th:inline="javascript">
var a = b = true;
/*<![CDATA[*/
if(a && b){
    alert('Yes');
}/*]]>*/
</script>

Answer №2

It is important to employ the <!CDATA[ safeguard for the complete content within the script tag.

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