l-assiette/tsconfig.json

{
    "compilerOptions": {
      // this aligns with Vue's browser support
      "target": "es5",
      // this enables stricter inference for data properties on `this`
      "strict": true,
      // if using webpack 2+ or rollup, to leverage tree shaking:
      "module": "es2015",
      "moduleResolution": "node"
    }
  }