.eslintrc.json

{
  "root": true,
  "overrides": [
    {
      "files": [
        "*.ts"
      ],
      "parserOptions": {
        "project": [
          "tsconfig.json"
        ],
        "createDefaultProgram": false
      },
      "extends": [
        "plugin:@angular-eslint/recommended",
        "plugin:@angular-eslint/template/process-inline-templates"
      ],
      "rules": {
        "@angular-eslint/directive-selector": [
          "error",
          {
            "type": "attribute",
            "prefix": "app",
            "style": "camelCase"
          }
        ],
        "@angular-eslint/component-selector": [
          "error",
          {
            "type": "element",
            "prefix": "app",
            "style": "kebab-case"
          }
        ],
        "semi": [
          "error",
          "always"
        ]
      }
    },
    {
      "files": [
        "*.html"
      ],
      "extends": [
        "plugin:@angular-eslint/template/recommended"
      ]
    },
    {
      "files": [
        "*.js"
      ],
      "extends": [
        "eslint:recommended"
      ],
      "rules": {
        "semi": [
          "error",
          "always"
        ]
      },
      "env": {
        "es6": true,
        "node": true
      },
      "parserOptions": {
        "ecmaVersion": 2018,
        "sourceType": "module"
      }
    }
  ]
}