add eslint support

switch off checks that fail

ui/.eslintrc.json

@@ -0,0 +1,40 @@
+{
+  "env": {
+    "node": true
+  },
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended", "prettier"],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 12,
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"],
+  "rules": {
+    "linebreak-style": ["error", "unix"],
+    "quotes": ["off", "single"],
+    "semi": ["error", "always"],
+    "no-duplicate-imports": ["error"],
+    "no-var": "off",
+    "prefer-const": "off",
+    "@typescript-eslint/explicit-module-boundary-types": "off",
+    "@typescript-eslint/no-non-null-assertion": "off",
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/no-inferrable-types": "off",
+    "@typescript-eslint/no-unused-vars": "off",
+    "@typescript-eslint/no-empty-interface": "off",
+    "@typescript-eslint/no-this-alias": "off",
+    "prefer-spread": "off",
+    "prefer-rest-params": "off",
+    "no-useless-escape": "off",
+    "no-empty": "off",
+    "@typescript-eslint/no-empty-function": "off",
+    "no-self-assign": "off",
+    "no-case-declarations": "off",
+    "no-constant-condition": "off",
+    "no-prototype-builtins": "off",
+    "no-extra-boolean-cast": "off",
+    "@typescript-eslint/ban-types": "off",
+    "no-async-promise-executor": "off",
+    "@typescript-eslint/adjacent-overload-signatures": "off"
+  }
+}

ui/package.json

@@ -12,6 +12,10 @@
     "breakpoint-sass": "^2.7.1"
   },
   "devDependencies": {
+    "@typescript-eslint/eslint-plugin": "^4.20.0",
+    "@typescript-eslint/parser": "^4.20.0",
+    "eslint": "^7.23.0",
+    "eslint-config-prettier": "^8.1.0",
     "glob": "^7.1.3",
     "gulp": "^4.0.2",
     "gulp-autoprefixer": "^7.0.1",
@@ -23,5 +27,9 @@
     "gulp-sass-inheritance": "^1.1",
     "gulp-size": "^3",
     "gulp-sourcemaps": "^3.0.0"
+  },
+  "scripts": {
+    "lint": "eslint . --ext .ts  --format visualstudio",
+    "lint-fix": "eslint . --ext .ts --fix"
   }
 }