Fix.

node_modules/cssstyle/.eslintrc.js

@@ -0,0 +1,50 @@
+'use strict';
+
+module.exports = {
+  root: true,
+  extends: ['eslint:recommended', 'prettier'],
+  parserOptions: {
+    ecmaVersion: 2018,
+  },
+  env: {
+    es6: true,
+  },
+  globals: {
+    exports: true,
+    module: true,
+    require: true,
+    window: true,
+  },
+  plugins: ['prettier'],
+  rules: {
+    'prettier/prettier': [
+      'warn',
+      {
+        printWidth: 100,
+        singleQuote: true,
+        trailingComma: 'es5',
+      },
+    ],
+    strict: ['warn', 'global'],
+  },
+  overrides: [
+    {
+      files: ['lib/implementedProperties.js', 'lib/properties.js'],
+      rules: {
+        'prettier/prettier': 'off',
+      },
+    },
+    {
+      files: 'scripts/**/*',
+      rules: {
+        'no-console': 'off',
+      },
+    },
+    {
+      files: ['scripts/**/*', 'tests/**/*'],
+      env: {
+        node: true,
+      },
+    },
+  ],
+};