feat: Use eslint optionally instead of postcss

Experimental feature, at first.

Author: prantlf

README.md

@@ -99,13 +99,17 @@ Default: `false`
 
 Enables minifying of the transformed CSS output. If an object is specified, it will be passed to the [cssnano] plugin.
 
+Experimental feature: if the object is set to `{ fast: true }`, [esbuild] will be used instead of [postcss].
+
 ### `inline`
 
 Type: `Boolean | Object`<br>
 Default: `false`
 
 Enables inlining of stylesheets and other assets. If an object is specified, it will have to include two properties pointing to objects: `{ stylesheets, assets }`. The `stylesheets` objects will be passed to the [postcss-import] plugin. The `assets` objects will be passed to the [postcss-url] plugin.
 
+Experimental feature: if the object is set to `{ fast: true }`, [esbuild] will be used instead of [postcss].
+
 ### `plugins`
 
 Type: `Array<Object>`<br>
@@ -186,6 +190,8 @@ Passing a booleans to the `litCss` plugin - `{ minify: true, inline: true }` - w
 
 Pass [options for cssnano] to `minify`, [options for postcss-import] to `inline.stylesheets` and [options for postcss-url] to `inline.assets`.
 
+Experimental feature: if the `minify` or `inline` object is set to `{ fast: true }`, [esbuild] will be used instead of [postcss].
+
 ## Contributing
 
 In lieu of a formal styleguide, take care to maintain the existing coding style. Lint and test your code.
@@ -208,6 +214,7 @@ Licensed under the [MIT License].
 [Pattern]: https://www.linuxjournal.com/content/bash-extended-globbing
 [PostCSS]: https://postcss.org/
 [cssnano]: https://cssnano.co/
+[esbuild]: https://esbuild.github.io/
 [postcss-import]: https://www.npmjs.com/package/postcss-import
 [postcss-url]: https://www.npmjs.com/package/postcss-url
 [postcss-fail-on-warn]: https://www.npmjs.com/package/postcss-fail-on-warn

package.json

@@ -30,9 +30,9 @@
   "scripts": {
     "prepare": "rollup -c",
     "lint": "denolint",
-    "check": "node test",
-    "cover": "c8 node test",
-    "test": "denolint && c8 node test"
+    "check": "teru-esm test/index.js",
+    "cover": "c8 node teru-esm test/index.js",
+    "test": "denolint && c8 teru-esm test/index.js"
   },
   "c8": {
     "check-coverage": true,
@@ -64,16 +64,17 @@
     "@rollup/pluginutils": "^4.2.1",
     "@semantic-release/changelog": "^6.0.1",
     "@semantic-release/git": "^10.0.1",
-    "postcss": "^8.4.13",
-    "rollup-copy-transform-css": "^1.1.0"
+    "postcss": "^8.4.14",
+    "rollup-copy-transform-css": "^1.2.1"
   },
   "devDependencies": {
     "@node-rs/deno-lint": "^1.13.1",
     "builtin-modules": "^3.3.0",
-    "c8": "^7.11.2",
-    "rollup": "^2.73.0",
-    "tehanu": "^0.2.2",
-    "tehanu-repo-coco": "^0.0.2"
+    "c8": "^7.11.3",
+    "rollup": "^2.74.1",
+    "tehanu": "^1.0.0",
+    "tehanu-repo-coco": "^1.0.0",
+    "tehanu-teru": "^1.0.0"
   },
   "peerDependencies": {
     "lit": "^2",