Why get Warning "Unknown tag" in Eclipse for Vaadin Elements

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I use Eclipse with Vaadin 8 and Vaadin Designer. In the Source mode view of the Vaadin designer, i get warning for all my Vaadin Elements. It is not a problem for the system but it is annoying to see these warnings all the time. I have added a shreenshot. How do I resolve these warnings?

unknown Tag

vaadin-designer vaadin8 vaadin eclipse html
1 Answers

The easiest way is just right click the editor and go preferences / web / validation. Select what you want to do with "Unknown tag name", e.g. ignore. You can set this for specific project, if you need html validation in other projects.

enter image description here

user_89621950
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