cjs => mjs

test/ecmascript/README.md

@@ -9,5 +9,5 @@ In our case, we only need to test parsing and not actually execute the tests.
 You can run the following script from this directory to update this test suite.
 
 ```sh
-node update-all-data.js
+node update-all-data.mjs
 ```

test/ecmascript/update-all-data.mjs

@@ -0,0 +1,15 @@
+import { readdir, writeFile } from 'fs/promises';
+import { dirname, join } from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+const files = await readdir(__dirname);
+for (const file of files.filter(f => f.startsWith('data-'))) {
+  const url = `https://raw.githubusercontent.com/kangax/compat-table/gh-pages/${file}`;
+  const res = await fetch(url);
+  const text = await res.text();
+  await writeFile(join(__dirname, file), text);
+}
+console.log('Update complete!')