fix(plugin): fix sass loader in deno 1.8 (#169)

Author: ije

plugins/sass.ts

@@ -1,12 +1,21 @@
-import { Options, renderSync } from 'https://esm.sh/[email protected].5'
+import { Options, Result } from 'https://esm.sh/[email protected].8'
 import type { LoaderPlugin } from '../types.ts'
 
+let renderSync: null | ((options: Options) => Result) = null
+
 export default (opts?: Options): LoaderPlugin => ({
   name: 'sass-loader',
   type: 'loader',
   test: /\.(sass|scss)$/i,
   acceptHMR: true,
   async transform({ content, url }) {
+    if (!('userAgent' in window.navigator)) {
+      Object.assign(window.navigator, { userAgent: `Deno/${Deno.version.deno}` })
+    }
+    if (renderSync === null) {
+      const sass = await import('https://esm.sh/[email protected]')
+      renderSync = sass.renderSync
+    }
     const { css, map } = renderSync({
       indentedSyntax: url.endsWith('.sass'),
       ...opts,