Eclipse fails to open .vue files in Web Page Editor
I found out what the problem is. The Error Log view showed more detailed information about the problem.
The HTML/Web Page Editor requires a file extension to have a valid content type. Because .vue files do not have a predefined content type, the editor just crashes.
As a workaround, you can simply add *.vue to the HTML content type. You can find this setting in Preferences → General → Content Types. Then add *.vue to HTML under Text.
You probably also want to set the default editor for .vue files to the HTML/Web Page Editor. You can do this in Preferences → General → Editors → File Associations
Sorry, that I cannot give out the bounty to anybody =)
You can find the window --> preferences-->editors as the picture shows:
If you do not set up, eclipse can not recognize the suffix of the file name do not know what way to use it