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spring-securitythymeleaf

Undefined attribute name (sec:authentication)

I'm using Thymleaf in my spring security simple POC. Below is my sample code in home.html file.

Hello <span sec:authentication="name">User</span>!i

How to get rid of the html warning 

Undefined attribute name (sec:authentication).
Solution

  • I Just duplicate the namespace for sec tag and html warning disappear

    <html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:th="http://www.thymeleaf.org"
    xmlns:sec="http://www.thymeleaf.org">