The VSCode setting "javascript.preferences.quoteStyle": "single" did not work for me and I'm still getting double quotes in my JavaScript snippets as shown in the picture:
Is there a way I can make VSCode use single quotes without having to use any external extension like Prettier?
Maybe you have a plugin that dictates the style of quotes. Have you tried changing the EditorConfig? https://github.com/editorconfig/editorconfig/wiki/EditorConfig-Properties
quote_type = "single"
But changing the preferences as you did would do the job. Going to try on my machine and edit this comment if I find out something.
You could also read about this PR to VSCode: https://github.com/Microsoft/TypeScript/pull/17750
BTW Maybe your snippets plugin has hardcoded double quotes
