tsconfig.json

{
    "compilerOptions": {
        "outDir": "extension",
        //// vue.js settings
        // https://kr.vuejs.org/v2/guide/typescript.html
        "target": "esnext",
        "strict": true,
        "module": "esnext",
        "moduleResolution": "node",
        "experimentalDecorators": true,
        //// web-ext-types settings
        "typeRoots": [
            "./node_modules/@types/",
            "./src/types",
            "./node_modules/web-ext-types"
        ],
        //// web settings
        "lib": [
            "es6",
            "dom"
        ],
        // https://github.com/masonz/parcel-vue-ts/blob/master/packages/template/tsconfig.json
        "newLine": "LF",
        "sourceMap": true,
        "sourceRoot": "src",
        "declaration": true,
        "jsx": "preserve",
        "noUnusedLocals": true,
        "noUnusedParameters": true,
        "noImplicitReturns": true,
        "noFallthroughCasesInSwitch": true,
        "emitDecoratorMetadata": true,
        "allowSyntheticDefaultImports": true,
    }
}