diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..4930578
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,90 @@
+// https://eslint.org/docs/user-guide/configuring
+
+module.exports = {
+  'root': true,
+  'parserOptions': {
+    ecmaVersion: 2017,
+  },
+  'env': {
+    browser: true,
+  },
+  'extends': [
+    // https://github.com/standard/standard/blob/master/docs/RULES-en.md
+    'eslint:recommended',
+  ],
+  'globals': {
+    cube: true,
+    cylinder: true,
+    difference: true,
+    sphere: true,
+    translate: true,
+    union: true,
+  },
+  // add your custom rules here
+  'rules': {
+    'array-bracket-newline': ['error', { multiline: true }],
+    'array-bracket-spacing': ['error'],
+    'arrow-body-style': ['error', 'as-needed'],
+    'arrow-parens': ['error', 'as-needed'],
+    'arrow-spacing': ['error', { before: true, after: true }],
+    'block-spacing': ['error'],
+    'brace-style': ['error', '1tbs'],
+    'comma-dangle': ['error', {
+      arrays: 'always-multiline',
+      objects: 'always-multiline',
+      imports: 'always-multiline',
+      exports: 'always-multiline',
+      functions: 'never', // Having trailing commas in functions breaks OpenJSCAD
+    }],
+    'comma-spacing': ['error'],
+    'comma-style': ['error', 'last'],
+    'curly': ['error'],
+    'dot-location': ['error', 'property'],
+    'dot-notation': ['error'],
+    'eol-last': ['error', 'always'],
+    'eqeqeq': ['error', 'always', { 'null': 'ignore' }],
+    'func-call-spacing': ['error', 'never'],
+    'function-paren-newline': ['error', 'multiline'],
+    'generator-star-spacing': ['off'], // allow async-await
+    'implicit-arrow-linebreak': ['error'],
+    'indent': ['error', 2],
+    'key-spacing': ['error', { beforeColon: false, afterColon: true, mode: 'strict' }],
+    'keyword-spacing': ['error'],
+    'linebreak-style': ['error', 'unix'],
+    'lines-between-class-members': ['error'],
+    'multiline-comment-style': ['warn'],
+    'newline-per-chained-call': ['error'],
+    'no-console': ['off'],
+    'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off', // allow debugger during development
+    'no-else-return': ['error'],
+    'no-extra-parens': ['error'],
+    'no-implicit-coercion': ['error'],
+    'no-lonely-if': ['error'],
+    'no-multiple-empty-lines': ['warn', { max: 2, maxEOF: 0, maxBOF: 0 }],
+    'no-multi-spaces': ['error'],
+    'no-trailing-spaces': ['error'],
+    'no-unneeded-ternary': ['error'],
+    'no-useless-return': ['error'],
+    'no-whitespace-before-property': ['error'],
+    'object-curly-newline': ['error', { consistent: true }],
+    'object-curly-spacing': ['error', 'always'],
+    'object-shorthand': ['error'],
+    'padded-blocks': ['error', 'never'],
+    'prefer-arrow-callback': ['error'],
+    'prefer-const': ['error'],
+    'prefer-object-spread': ['error'],
+    'prefer-template': ['error'],
+    'quote-props': ['error', 'consistent-as-needed', { keywords: true }],
+    'quotes': ['error', 'single', { allowTemplateLiterals: true }],
+    'semi': ['error', 'never'],
+    'space-before-blocks': ['error', 'always'],
+    'spaced-comment': ['warn', 'always'],
+    'space-infix-ops': ['error'],
+    'space-in-parens': ['error', 'never'],
+    'space-unary-ops': ['error', { words: true, nonwords: false }],
+    'switch-colon-spacing': ['error'],
+    'unicode-bom': ['error', 'never'],
+    'wrap-iife': ['error'],
+    'yoda': ['error'],
+  },
+}
diff --git a/sonoff_dev_housing.jscad b/sonoff_dev_housing.jscad
index ebf8132..632844f 100644
--- a/sonoff_dev_housing.jscad
+++ b/sonoff_dev_housing.jscad
@@ -1,6 +1,8 @@
-// title      : Sonoff DEV box for lamp post
-// author     : Knut Ahlers
-// revision   : 0.2.3
+/*
+ * title      : Sonoff DEV box for lamp post
+ * author     : Knut Ahlers
+ * revision   : 0.2.3
+ */
 
 // All measurements in mm
 const boardSize = 51 // 51x51mm