CSS tag name lowercasing

Prettier 1.14.3 Playground link

--parser scss

Input:

Label {
	font-size: 24;
}

Output:

label {
  font-size: 24;
}

Expected behavior:

Label {
  font-size: 24;
}

I am using prettier on a NativeScript project, which uses an Xml markup with some tag names similar to html but with uppercase names (like Label and Button). CSS is largely case-insensitive, so the styles still apply properly even with the incorrect lowercase tag names output by prettier, but it sure looks inconsistent when looking at the markup and the styles together.

[alexander-akait]

@chevallard maybe we can detect what you use css for html or for xml, do you use some declaration for this?

[chevallard]

According to the CSS spec, the document that the CSS is being applied to determines case sensitivity. The CSS file has no indication of which type of document it is being applied to. This is an issue when we are using the supported CSS/Less/Sass.