add .eslintrc.json

.eslintrc.json

@@ -0,0 +1,36 @@
+{
+  "globals": {
+    "H5P": true,
+    "H5PIntegration": true,
+    "H5PEditor": true,
+    "CodeMirror": true
+  },
+  "env": {
+    "browser": true,
+    "node": true
+  },
+  "extends": "eslint:recommended",
+  "parserOptions": {
+    "sourceType": "module",
+    "ecmaVersion": 2020
+  },
+  "rules": {
+    "valid-jsdoc": "off",
+    "semi": [2, "always"],
+    "indent": ["error", 2, {"SwitchCase": 1}],
+    "brace-style": ["error", "stroustrup"],
+    "keyword-spacing": ["error", {"after": true}],
+    "comma-spacing": ["error", { "before": false, "after": true }],
+    "space-infix-ops": ["error", {"int32Hint": false}],
+    "eqeqeq": [2, "smart"],
+    "space-before-blocks": "error",
+    "space-before-function-paren": ["error", {
+      "anonymous": "always",
+      "named": "never",
+      "asyncArrow": "always"
+    }],
+    "quotes": [2, "single"],
+    "no-extra-boolean-cast": "off",
+    "no-console": ["error", {"allow": ["warn", "error"]}]
+  }
+}