Compile .css.ts files with ts loader (#68)

Author: jahredhope

.changeset/sweet-turkeys-rhyme.md

@@ -0,0 +1,5 @@
+---
+'@vanilla-extract/esbuild-plugin': patch
+---
+
+Fix errors occurring when using TypeScript in .css.ts files

fixtures/themed/src/shared.css.ts

@@ -1,6 +1,6 @@
 import { globalStyle, style } from '@vanilla-extract/css';
 
-export const shadow = style({
+export const shadow: string = style({
   boxShadow: '0 0 5px red',
 });
 

packages/esbuild-plugin/src/index.ts

@@ -53,6 +53,7 @@ const vanillaExtractFilescopePlugin = (): Plugin => ({
 
         return {
           contents,
+          loader: path.match(/\.(ts|tsx)$/i) ? 'ts' : undefined,
           resolveDir: dirname(path),
         };
       }