Rewrite the simpler scripts

The output of generateImplementedProperties.mjs is much nicer now. It was needlessly complex before.

lib/allProperties.js

@@ -1,11 +1,6 @@
 'use strict';
-
-// autogenerated - 9/7/2024
-
-/*
- *
- * https://www.w3.org/Style/CSS/all-properties.en.html
- */
+// autogenerated - 2024-09-07
+// https://www.w3.org/Style/CSS/all-properties.en.html
 
 module.exports = new Set([
   '-webkit-line-clamp',
@@ -126,7 +121,6 @@ module.exports = new Set([
   'caret',
   'caret-color',
   'caret-shape',
-  'chains',
   'clear',
   'clip',
   'clip-path',
@@ -180,7 +174,6 @@ module.exports = new Set([
   'float',
   'flood-color',
   'flood-opacity',
-  'flow',
   'flow-from',
   'flow-into',
   'font',

package.json

@@ -53,9 +53,9 @@
     "resolve": "^1.22.1"
   },
   "scripts": {
-    "download": "node ./scripts/download_latest_properties.js && eslint lib/allProperties.js --fix",
+    "download": "node ./scripts/downloadLatestProperties.mjs && eslint lib/allProperties.js --fix",
     "generate": "run-p generate:*",
-    "generate:implemented_properties": "node ./scripts/generate_implemented_properties.js",
+    "generate:implemented_properties": "node ./scripts/generateImplementedProperties.mjs",
     "generate:properties": "node ./scripts/generate_properties.js",
     "lint": "npm run generate && eslint --max-warnings 0",
     "lint:fix": "eslint --fix --max-warnings 0",

scripts/downloadLatestProperties.mjs

@@ -0,0 +1,52 @@
+// The W3C CSSWG provides a JSON list of all CSS properties and their status in the standard.
+// See the documentation at https://www.w3.org/Style/CSS/all-properties.en.html.
+//
+// This script downloads that file and uses it to write an appropriately-filtered Set of property
+// names to a file.
+
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const url = 'https://www.w3.org/Style/CSS/all-properties.en.json';
+const outputFile = resolve('../lib/allProperties.js');
+const unwantedStatuses = new Set(['NOTE', 'ED', 'FPWD']);
+
+console.log('Downloading CSS properties...');
+
+const res = await fetch(url);
+if (res.status !== 200) {
+  throw new Error('Bad status code: ' + res.status);
+}
+
+const rawCSSProperties = await res.json();
+
+const propertyNames = new Set();
+for (const cssProp of rawCSSProperties) {
+  // Filter out properties from too-new statuses.
+  // Also, '--*' needs additional logic to this module, so filter it out for now.
+  if (unwantedStatuses.has(cssProp.status) || cssProp.property === '--*') {
+    continue;
+  }
+
+  propertyNames.add(cssProp.property);
+}
+
+const propertyNamesJSON = JSON.stringify(Array.from(propertyNames), undefined, 2);
+const dateToday = new Date();
+const dateTodayFormatted = dateToday.toISOString().split('T')[0];
+
+const output = `
+'use strict';
+// autogenerated - ${dateTodayFormatted}
+// https://www.w3.org/Style/CSS/all-properties.en.html
+
+module.exports = new Set(${propertyNamesJSON});
+`;
+
+fs.writeFileSync(outputFile, output);
+
+// TODO: remove when we can drop Node.js 18 support and use import.meta.dirname.
+function resolve(relativePath) {
+  return path.resolve(path.dirname(fileURLToPath(import.meta.url)), relativePath);
+}

scripts/generateImplementedProperties.mjs

@@ -0,0 +1,30 @@
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { camelToDashed } from '../lib/parsers.js';
+
+const dashedProperties = fs
+  .readdirSync(resolve('../lib/properties'))
+  .filter((propertyFile) => path.extname(propertyFile) === '.js')
+  .map((propertyFile) => camelToDashed(path.basename(propertyFile, '.js')));
+
+const outputFile = resolve('../lib/implementedProperties.js');
+
+const propertyNamesJSON = JSON.stringify(dashedProperties, undefined, 2);
+const dateToday = new Date();
+const dateTodayFormatted = dateToday.toISOString().split('T')[0];
+
+const output = `
+'use strict';
+// autogenerated - ${dateTodayFormatted}
+// https://www.w3.org/Style/CSS/all-properties.en.html
+
+module.exports = new Set(${propertyNamesJSON});
+`;
+
+fs.writeFileSync(outputFile, output);
+
+// TODO: remove when we can drop Node.js 18 support and use import.meta.dirname.
+function resolve(relativePath) {
+  return path.resolve(path.dirname(fileURLToPath(import.meta.url)), relativePath);
+}