pwa-3 practice: read json file async with promises (typescript)

fsPromise.ts

var fs = require('fs');
//npm install @types/node @types/es6-promise

function loadFromJson(filename: string) {
    //TODO: read files async with Promises
}

var files: string[] = [
    "good.json", "absent.json", "good2.json", "invalid.json", "good3.json"
];
//TODO:
// Read Files in order of array and abort if error occurs
// Hints:
// fs.readFile(file: str, (err, data) => {})
// JSON.parse(str): any

good.json

{"message": "first file"}

good2.json

{"message": "second file"}

good3.json

{"message": "third file"}

invalid.json

{invalid: json}

package.json

{
  "name": "fspromise",
  "version": "1.0.0",
  "description": "",
  "main": "build/js/fsPromise.js",
  "scripts": {
    "demo": "tsc && node build/js/fsPromise.js",
    "setGist": "gist -o -u 5d1aaef02e45a25dddbf16ab0f174815 fsPromise.ts package.json tsconfig.json good.json good2.json good3.json invalid.json .gitignore"
  },
  "author": "",
  "license": "Apache-2.0",
  "devDependencies": {
    "@types/node": "^6.0.45",
    "@types/es6-promise": "0.0.32"
  }
}

tsconfig.json

{
    "compilerOptions": {
        "target": "es5",
        "module": "commonjs",
        "removeComments": true,
        "typeRoots": [
            "node_modules/@types"
        ],
        "outDir": "build/js",
        "inlineSourceMap": true
    },
    "exclude": [
        "node_modules"
    ]
}