refactor: Convert w3c download script to esm

Author: vio

package-lock.json

@@ -6,7 +6,7 @@
   "main": "index.js",
   "scripts": {
     "bump": "npm version patch && npm publish && git push && git push --tags",
-    "download-w3c-data": "node scripts/download-w3c-data",
+    "download-w3c-data": "node scripts/download-w3c-data.mjs",
     "generate": "node scripts/generate",
     "lint": "eslint index.js scripts/*.js",
     "test": "echo \"Error: no test specified\" && exit 1"
@@ -47,7 +47,6 @@
   },
   "homepage": "https://github.com/known-css/known-css-properties#readme",
   "devDependencies": {
-    "axios": "0.27.2",
     "eslint": "8.56.0",
     "globby": "13.2.2",
     "lodash.sortby": "4.7.0",

package.json

@@ -0,0 +1,29 @@
+import fs from 'fs/promises';
+import path from 'path';
+import uniq from 'lodash.uniq';
+
+const outputFilepath = path.join(process.cwd(), 'source/w3c.json');
+const url = 'https://www.w3.org/Style/CSS/all-properties.en.json';
+const validStatuses = ['REC', 'CR', 'LC', 'WD', 'FPWD', 'ED'];
+
+function isEntryValid ({ property, status }) {
+  return !property.startsWith('--') && validStatuses.includes(status);
+}
+
+async function saveData(properties) {
+  return fs.writeFile(outputFilepath, JSON.stringify({ properties }, null, 2));
+}
+
+async function downloadData() {
+  const res = await fetch(url);
+  return res.json();
+}
+
+(async () => {
+  const response = await downloadData();
+
+  const allProperties = response.filter(isEntryValid).map(({ property }) => property);
+  const properties = uniq(allProperties);
+
+  await saveData(properties);
+})()