tsconfig.json

{
  "extends": "./node_modules/@microsoft/rush-stack-compiler-3.3/includes/tsconfig-web.json",
  "compilerOptions": {
    "target": "es5",
    "forceConsistentCasingInFileNames": true,
    "module": "esnext",
    "moduleResolution": "node",
    "jsx": "react",
    "declaration": true,
    "sourceMap": true,
    "experimentalDecorators": true,
    "skipLibCheck": true,
    "outDir": "lib",
    "inlineSources": false,
    "strictNullChecks": false,
    "noUnusedLocals": false,
    "typeRoots": [
      "./node_modules/@types",
      "./node_modules/@microsoft"
    ],
    "types": [
      "es6-promise",
      "webpack-env"
    ],
    "lib": [
      "es5",
      "ESNext",
      "dom",
      "es2015.collection"
    ],
    "esModuleInterop": true
  },
  "include": [
    "src/**/*.ts", "src/webparts/imageDisplay/components/gallery/gallery.tsx", "src/webparts/imageDisplay/components/gallery/image/image.tsx"
  ],
  "exclude": [
    "node_modules",
    "lib"
  ]
}