Thymeleaf Tutorial: Chapter 10. Attribute Priority

Table of contents

10 Attribute Priority

What happens when you write more than one th: * attribute in one tag? For example:

<ul> <li th:each="item : ${items}" th:text="${item.description}">Item description here...</li> </ul> 

We expect that the th: each attribute will be executed before the th: text so that we get the desired results, but given the fact that the HTML / XML standards have no meaning for the order of the attribute in the tag, the priority mechanism must be set in the attributes themselves , to be sure that this will work as expected.

Thus, all Thymeleaf attributes define a numeric value that sets the order in which they are executed in the tag. This order:
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Order	Functionality	Attributes
one	Inclusion of fragments	th: insert th: replace
2	Fragment iteration	th: each
3	Conditional execution	th: if th: unless th: switch th: case
four	Local variable definition	th: object th: with
five	The main attribute modification	th: attr th: attrprepend th: attrappend
6	Specific attribute modification	th: value th: href th: src ...
7	Text (tag body modification)	th: text th: utext
eight	Fragment definition	th: fragment
9	Removing a fragment	th: remove

This priority mechanism means that the above iteration fragment will produce exactly the same results if the attribute position is inverted (although it will be slightly less readable):

 <ul> <li th:text="${item.description}" th:each="item : ${items}">Item description here...</li> </ul>