Validation(HTML5) : Element 'app-root' is not supported.

Yogendra Sahu

7y2.4k.NET

I am integrating Angular 4 with ASP.NET WebForm.

Created an angular folder using ng new AngularApp command and set default.aspx page as startpage.

I have included tag inside Default.aspx page to call angular page, but it's not working for me.

I am getting Validation (HTML5): Element 'app-root' is not supported(mentioned in screenshot)

Please help me out how to initialize angular in ASP.NET WebForm?

10 Replies

Know the answer? Post it — somebody with the same question will find it here.

Rajeesh Menoth7y ago
Accepted answer
Hi,

I think the following article will help you.

Reference :

http://www.binaryintellect.net/articles/b7889ecf-1ac4-434a-ba19-a254fcc8deef.aspx
+3
Pandit Mukesh5y ago
HI Sanwar,

I have checked the url which you have given but its only working for mvc not for .aspx page.

Here, I have app-root which is not rendring, I have included all the related js file like vendor, polyfills, main, runtime but its not supporting. Same thing is working with .cshtml page.
Please help some suggesstions.
Thanks
+1
Pandit Mukesh5y ago
Hi Yogendra,

I am facing the same problem. I have the same requirement and getting html validation error.
Please suggest some solution.
Thanks.
0
Yogendra Sahu7y ago
Thank you all
+1
Yashi7y ago
Hi bro share me code , I will download it and I shall Try?
+2
Sanwar Ranwa7y ago
Check this

http://www.binaryintellect.net/articles/b7889ecf-1ac4-434a-ba19-a254fcc8deef.aspx
0
Yogendra Sahu7y ago
Hii Sanwar,

Thanks, the given solution is related to WebApi.
I have created the webforms and I want to intialize angular page from webforms(Default.aspx) by including .
Is there any way to initialize angular form webform?

Please help me out.
+1
Yogendra Sahu7y ago
Hii Rajeesh,

Thanks, but the given solution on StackOverflow is for mvc not for webform.
Actually the problem is, aspx page doesn't recognize the HTML5 tag, that's why it doesn't redirect to the angular page.
+1
Sanwar Ranwa7y ago
Check this it may help you

https://stackoverflow.com/questions/53436869/why-app-root-is-not-a-known-element-with-out-body-tag
+2
Rajeesh Menoth7y ago
Hi,

Please go through the below reference.

Reference :

https://stackoverflow.com/questions/22839390/validationhtml5-element-t-is-not-supported

https://stackoverflow.com/questions/35644123/the-selector-my-app-did-not-match-any-elements
+2