Scripts for Building and Testing pure TypeScript applications.

package.json

{
  "main": "./cjs/index.js",
  "module": "./esm/index.js",
  "typings": "./esm/index.d.ts",
  "esnext": "./esm/index.js",
  "scripts": {
    "clean": "yarn shx rm -rf dist output",
    "test": "yarn test:build && yarn test:run",
    "test:build": "tsc --build tsconfig.test.json",
    "test:run": "mocha -r tsconfig-paths/register --timeout 200000 output/tests/**/*.spec.js",
    "cover": "nyc --reporter=lcov --reporter=text yarn test",
    "build": "yarn clean && yarn build:es2015 && yarn build:esm && yarn build:cjs && yarn build:umd && yarn build:umd:min && yarn build:copy",
    "build:es2015": "tsc --build tsconfig.lib-es2015.json",
    "build:esm": "tsc --build tsconfig.lib-esm.json",
    "build:cjs": "tsc --build tsconfig.lib-cjs.json",
    "build:umd": "rollup dist/esm/index.js --format umd --name ZXingLibrary --sourcemap --file dist/umd/zxing-library.js",
    "build:umd:min": "cd dist/umd && terser --compress --mangle --source-map --screw-ie8 --comments -o zxing-library.min.js -- zxing-library.js && gzip zxing-library.min.js -c > zxing-library.min.js.gz",
    "build:copy": "cp README.md dist && cp package.json dist && cp LICENSE dist",
    "shx": "./node_modules/.bin/shx",
    "tsc": "./node_modules/.bin/tsc",
  }
}

tsconfig.json

{
  "compilerOptions": {
    "baseUrl": "./",
    "module": "commonjs",
    "target": "es5",
    "moduleResolution": "node",
    "lib": [
      "es7",
      "dom"
    ],
    "alwaysStrict": true,
    "noImplicitAny": false,
    "sourceMap": true,
    "declaration": true,
    "preserveConstEnums": true,
    "downlevelIteration": true,
    "paths": {
      "@zxing/library": [
        "./dist"
      ],
      "@zxing/library/*": [
        "./dist/*"
      ]
    }
  },
  "include": [
    "src/**/*.ts"
  ]
}

tsconfig.lib-cjs.json

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "module": "commonjs",
    "target": "es5",
    "outDir": "dist/cjs"
  },
  "exclude": [
    "src/test"
  ]
}

tsconfig.lib-es2015.json

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "module": "es2015",
    "target": "es2015",
    "outDir": "dist/es2015"
  },
  "exclude": [
    "src/test"
  ]
}

tsconfig.lib-esm.json

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "module": "es2015",
    "target": "es5",
    "outDir": "dist/esm"
  },
  "exclude": [
    "src/test"
  ]
}

tsconfig.test.json

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "target": "es6",
    "module": "commonjs",
    "moduleResolution": "node",
    "lib": [
      "es7",
      "dom"
    ],
    "outDir": "output/tests"
  },
  "include": [
    "src/test/**/*.ts"
  ],
  "exclude": [
    "node_modules",
    "src/core"
  ]
}

TypeScript outputs some polyfill function declarations checking for stuff inside this, which Rollup rewrites to undefined, since the UMD scope this points to the function scope itself.

Using this knowledge, I've changed the context (which is the global context or this the source is trying to achieve) option in rollup.config.js so the library can find the window context and check for stuff it needs: context: '(globalThis || window || undefined)'.

Aand the result:

Looks awful doesn't it? 😄
The important part is that it works.

I'll be including the rollup.config.js file here once it is ready.