VSCode single to double quote automatic replace

For projects that use .editorconfig file by default. The formatter will ignore the rules in the settings and use the rules in .editorconfig, then you can either:

• Remove .editorconfig file, and use your VSCode settings.
• Add quote_type = single to the .editorconfig file regarding your file type. You can also set quote_type value to double or auto.

Well, like the guy (@user2982122) mentioned but instead of File go to Code -> Preferences -> Settings, then look for Quote, select Prettier and check both boxes

I dont have prettier extension installed, but after reading the possible duplicate answer I've added from scratch in my User Setting (UserSetting.json, Ctrl+, shortcut):

"prettier.singleQuote": true

A part a green warning (Unknown configuration setting) the single quotes are no more replaced.

I suspect that the prettier extension is not visible but is embedded inside the Vetur extension.