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Using NetBeans 8.1.

I have a SpringBoot project that uses Thymeleaf as template, everything is working but in the html page when i use the tag

<html lang="en-US" xmlns:th="http://www.thymeleaf.org">

i have the error Attribute with the local name "xmlns:th" is not serializable as XML 1.0, i can use thymeleaf functions like th:each or th:text but they always show the same error and i'm not able to have suggestions when typing, is there a way to fix this ?

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4 Answers 4

Reset to default
8

Adding xmlns="http://www.w3.org/1999/xhtml" fixes the errors in netbeans. I've not been able to get suggestions to work.

<html lang="en-US" xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
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Please do not merely post code but instead do explain.
1

Use this third party plugin, you just need to download the plugin and then inside Netbeans go to:

• Tools -> Plugins -> Downloaded -> Add plugins

Search the downloaded plugin and install it. Reboot Netbeans and now you have thymeleaf code completion.

Also I have added xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org" Inside the tag.

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Please include the relevant information in your answer.
The third party plugin in the link worked fine for me in Netbeans 20. It's named 'NB-Thymeleaf-Code-Completion' and the latest release on GitHub dates back to 2019.
0

Just ignore it. That's why probably the IDE it is not handling (or have not a suitable plugin for) the Thymeleaf schema and thus it is throwing a validation error, but it doesn't affect your application or Thymeleaf compilation.

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0

I had a similar issue in the past, however I was using the tag in a html document that was in a static folder. My understanding is that it would have to be in templates folder under resource folder. Its suppose to be a dynamic page so it would make sense if it doesn't work in a static folder. Hope this helps. dependencyoutput on localhost code in @controller dynamic html code

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