tsconfig.json

{
    "compilerOptions": {
        "jsx": "preserve",
        "jsxImportSource": "preact",
        "module": "es2020",
        "moduleResolution": "node",
        "esModuleInterop": true,
        "lib": ["webworker", "dom", "dom.iterable", "es2020"],
        "target": "es2015",
        "strict": true,
        "strictNullChecks": true,
        // TODO:
        "noUncheckedIndexedAccess": false,
        "skipLibCheck": true,
        "noImplicitAny": true,
        "forceConsistentCasingInFileNames": true,

        "allowJs": true,
        "checkJs": false,
        "resolveJsonModule": true,

        "noEmit": true,
        "rootDir": "./",
        "baseUrl": ".",
        "paths": {
            "react": ["node_modules/preact/compat"],
            "react-dom": ["node_modules/preact/compat"]
        }
    },
    "include": ["src/**/*.ts", "src/**/*.tsx"]
}