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
• GSP supports GString expressions inside the content whilst JSP requires you to use <c:out value="${it}" />

There are many shared tags but some additional ones for both GSP (mainly groovy syntax tags) and JSP hence we have 2 reference sections:

1. GSP Tag Reference
2. JSP Tag Reference