The Grails Custom Tag Library
Grails supports both GSP and JSP as view technologies. There are however some key differences between the 2 view technologies which are listed below:
- GSP uses groovy inside scriptlets while JSP is Java
- GSP attribute values when surrounded with the ${..} (eg. test="${it=='true'}") syntax are Groovy expressions, while in JSP these are JSTL expressions (and hence more limited)
- JSP supports custom tag libraries through the TLD while GSP supports custom tag libraries with Grails Dynamic Tag Libraries and does not support JSTL
- GSP supports GString expressions inside the content whilst JSP requires you to use <c:out value="${it}" />
- GSP supports the %{-- .. --}% comment syntax as well as JSP's <%-- .. --%> syntax.
There are many shared tags but some additional ones for both GSP (mainly groovy syntax tags) and JSP hence we have 2 reference sections:
