tsconfig.json

{
  "compilerOptions": {
    "target": "es2021",
    "module": "es2020",
    "moduleResolution": "node",
    "lib": ["es2021", "dom", "dom.iterable"],
    "noEmit": true,
    "noErrorTruncation": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "strict": true,
    "noImplicitAny": false,
    "skipLibCheck": true,
    "resolveJsonModule": true,
    "experimentalDecorators": true,
    "esModuleInterop": true,
    "sourceMap": true,
    "plugins": [
      {
        "name": "ts-lit-plugin",
        "strict": false,
        // These tags are provided by the HA frontend and [almost all] cannot be
        // imported by a custom card directly.
        "globalTags": [
          "ha-button-menu",
          "ha-button",
          "ha-card",
          "ha-circular-progress",
          "ha-combo-box",
          "ha-icon-button",
          "ha-icon",
          "ha-selector",
          "mwc-button",
          "mwc-list-item"
        ],
        "rules": {
          "no-unknown-tag-name": "error",
          "no-missing-import": "error",
          "no-unclosed-tag": "error",
          "no-incompatible-type-binding": "warning",
          "no-invalid-css": "warning",
          "no-missing-element-type-definition": "warning",
          "no-property-visibility-mismatch": "error"
        }
      }
    ]
  }
}